text: // Copyright 2013 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "content/renderer/render_frame_impl.h"
  
  #include <map>
  #include <string>
  
  #include "base/command_line.h"
  #include "base/i18n/char_iterator.h"
  #include "base/strings/utf_string_conversions.h"
  #include "base/time/time.h"
  #include "content/child/appcache/appcache_dispatcher.h"
  #include "content/child/plugin_messages.h"
  #include "content/child/quota_dispatcher.h"
  #include "content/child/request_extra_data.h"
  #include "content/child/service_worker/web_service_worker_provider_impl.h"
  #include "content/common/frame_messages.h"
  #include "content/common/socket_stream_handle_data.h"
  #include "content/common/swapped_out_messages.h"
  #include "content/common/view_messages.h"
  #include "content/public/common/content_constants.h"
  #include "content/public/common/content_switches.h"
  #include "content/public/common/url_constants.h"
  #include "content/public/renderer/content_renderer_client.h"
  #include "content/public/renderer/document_state.h"
  #include "content/public/renderer/navigation_state.h"
  #include "content/public/renderer/render_frame_observer.h"
  #include "content/renderer/accessibility/renderer_accessibility.h"
  #include "content/renderer/browser_plugin/browser_plugin.h"
  #include "content/renderer/browser_plugin/browser_plugin_manager.h"
  #include "content/renderer/internal_document_state_data.h"
  #include "content/renderer/npapi/plugin_channel_host.h"
  #include "content/renderer/render_thread_impl.h"
  #include "content/renderer/render_view_impl.h"
  #include "content/renderer/render_widget_fullscreen_pepper.h"
  #include "content/renderer/renderer_webapplicationcachehost_impl.h"
  #include "content/renderer/websharedworker_proxy.h"
  #include "net/base/net_errors.h"
  #include "net/http/http_util.h"
  #include "third_party/WebKit/public/platform/WebStorageQuotaCallbacks.h"
  #include "third_party/WebKit/public/platform/WebString.h"
  #include "third_party/WebKit/public/platform/WebURL.h"
  #include "third_party/WebKit/public/platform/WebURLError.h"
  #include "third_party/WebKit/public/platform/WebURLResponse.h"
  #include "third_party/WebKit/public/platform/WebVector.h"
  #include "third_party/WebKit/public/web/WebDocument.h"
  #include "third_party/WebKit/public/web/WebFrame.h"
  #include "third_party/WebKit/public/web/WebNavigationPolicy.h"
  #include "third_party/WebKit/public/web/WebPlugin.h"
  #include "third_party/WebKit/public/web/WebPluginParams.h"
  #include "third_party/WebKit/public/web/WebSearchableFormData.h"
  #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
  #include "third_party/WebKit/public/web/WebView.h"
  #include "webkit/child/weburlresponse_extradata_impl.h"
  
  #if defined(ENABLE_PLUGINS)
  #include "content/renderer/npapi/webplugin_impl.h"
  #include "content/renderer/pepper/pepper_browser_connection.h"
  #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
  #include "content/renderer/pepper/pepper_webplugin_impl.h"
  #include "content/renderer/pepper/plugin_module.h"
  #endif
  
  #if defined(ENABLE_WEBRTC)
  #include "content/renderer/media/rtc_peer_connection_handler.h"
  #endif
  
  using blink::WebDataSource;
  using blink::WebDocument;
  using blink::WebFrame;
  using blink::WebNavigationPolicy;
  using blink::WebPluginParams;
  using blink::WebReferrerPolicy;
  using blink::WebSearchableFormData;
  using blink::WebSecurityOrigin;
  using blink::WebServiceWorkerProvider;
  using blink::WebStorageQuotaCallbacks;
  using blink::WebString;
  using blink::WebURL;
  using blink::WebURLError;
  using blink::WebURLRequest;
  using blink::WebURLResponse;
  using blink::WebUserGestureIndicator;
  using blink::WebVector;
  using blink::WebView;
  using base::Time;
  using base::TimeDelta;
  using webkit_glue::WebURLResponseExtraDataImpl;
  
  namespace content {
  
  namespace {
  
  typedef std::map<blink::WebFrame*, RenderFrameImpl*> FrameMap;
  base::LazyInstance<FrameMap> g_child_frame_map = LAZY_INSTANCE_INITIALIZER;
  
  }  // namespace
  
  static RenderFrameImpl* (*g_create_render_frame_impl)(RenderViewImpl*, int32) =
      NULL;
  
  // static
  RenderFrameImpl* RenderFrameImpl::Create(RenderViewImpl* render_view,
                                           int32 routing_id) {
    DCHECK(routing_id != MSG_ROUTING_NONE);
  
    if (g_create_render_frame_impl)
      return g_create_render_frame_impl(render_view, routing_id);
    else
      return new RenderFrameImpl(render_view, routing_id);
  }
  
  // static
  void RenderFrameImpl::InstallCreateHook(
      RenderFrameImpl* (*create_render_frame_impl)(RenderViewImpl*, int32)) {
    CHECK(!g_create_render_frame_impl);
    g_create_render_frame_impl = create_render_frame_impl;
  }
  
  // RenderFrameImpl ----------------------------------------------------------
  RenderFrameImpl::RenderFrameImpl(RenderViewImpl* render_view, int routing_id)
      : render_view_(render_view),
        routing_id_(routing_id),
        is_swapped_out_(false),
        is_detaching_(false) {
    RenderThread::Get()->AddRoute(routing_id_, this);
  #if defined(ENABLE_PLUGINS)
    new PepperBrowserConnection(this);
  #endif
  
    GetContentClient()->renderer()->RenderFrameCreated(this);
  }
  
  RenderFrameImpl::~RenderFrameImpl() {
    FOR_EACH_OBSERVER(RenderFrameObserver, observers_, RenderFrameGone());
    FOR_EACH_OBSERVER(RenderFrameObserver, observers_, OnDestruct());
    RenderThread::Get()->RemoveRoute(routing_id_);
  }
  
  RenderWidget* RenderFrameImpl::GetRenderWidget() {
    return render_view_;
  }
  
  #if defined(ENABLE_PLUGINS)
  void RenderFrameImpl::PepperPluginCreated(RendererPpapiHost* host) {
    FOR_EACH_OBSERVER(RenderFrameObserver, observers_,
                      DidCreatePepperPlugin(host));
  }
  
  void RenderFrameImpl::PepperInstanceCreated(
      PepperPluginInstanceImpl* instance) {
    active_pepper_instances_.insert(instance);
  }
  
  void RenderFrameImpl::PepperInstanceDeleted(
      PepperPluginInstanceImpl* instance) {
    active_pepper_instances_.erase(instance);
  
    if (render_view_->pepper_last_mouse_event_target() == instance)
      render_view_->set_pepper_last_mouse_event_target(NULL);
    if (render_view_->focused_pepper_plugin() == instance)
      PepperFocusChanged(instance, false);
  }
  
  void RenderFrameImpl::PepperDidChangeCursor(
      PepperPluginInstanceImpl* instance,
      const blink::WebCursorInfo& cursor) {
    // Update the cursor appearance immediately if the requesting plugin is the
    // one which receives the last mouse event. Otherwise, the new cursor won't be
    // picked up until the plugin gets the next input event. That is bad if, e.g.,
    // the plugin would like to set an invisible cursor when there isn't any user
    // input for a while.
    if (instance == render_view_->pepper_last_mouse_event_target())
      GetRenderWidget()->didChangeCursor(cursor);
  }
  
  void RenderFrameImpl::PepperDidReceiveMouseEvent(
      PepperPluginInstanceImpl* instance) {
    render_view_->set_pepper_last_mouse_event_target(instance);
  }
  
  void RenderFrameImpl::PepperFocusChanged(PepperPluginInstanceImpl* instance,
                                           bool focused) {
    if (focused)
      render_view_->set_focused_pepper_plugin(instance);
    else if (render_view_->focused_pepper_plugin() == instance)
      render_view_->set_focused_pepper_plugin(NULL);
  
    GetRenderWidget()->UpdateTextInputType();
    GetRenderWidget()->UpdateSelectionBounds();
  }
  
  void RenderFrameImpl::PepperTextInputTypeChanged(
      PepperPluginInstanceImpl* instance) {
    if (instance != render_view_->focused_pepper_plugin())
      return;
  
    GetRenderWidget()->UpdateTextInputType();
    if (render_view_->renderer_accessibility()) {
      render_view_->renderer_accessibility()->FocusedNodeChanged(
          blink::WebNode());
    }
  }
  
  void RenderFrameImpl::PepperCaretPositionChanged(
      PepperPluginInstanceImpl* instance) {
    if (instance != render_view_->focused_pepper_plugin())
      return;
    GetRenderWidget()->UpdateSelectionBounds();
  }
  
  void RenderFrameImpl::PepperCancelComposition(
      PepperPluginInstanceImpl* instance) {
    if (instance != render_view_->focused_pepper_plugin())
      return;
    Send(new ViewHostMsg_ImeCancelComposition(render_view_->GetRoutingID()));;
  #if defined(OS_MACOSX) || defined(OS_WIN) || defined(USE_AURA)
    GetRenderWidget()->UpdateCompositionInfo(true);
  #endif
  }
  
  void RenderFrameImpl::PepperSelectionChanged(
      PepperPluginInstanceImpl* instance) {
    if (instance != render_view_->focused_pepper_plugin())
      return;
    render_view_->SyncSelectionIfRequired();
  }
  
  RenderWidgetFullscreenPepper* RenderFrameImpl::CreatePepperFullscreenContainer(
      PepperPluginInstanceImpl* plugin) {
    GURL active_url;
    if (render_view_->webview() && render_view_->webview()->mainFrame())
      active_url = GURL(render_view_->webview()->mainFrame()->document().url());
    RenderWidgetFullscreenPepper* widget = RenderWidgetFullscreenPepper::Create(
        GetRenderWidget()->routing_id(), plugin, active_url,
        GetRenderWidget()->screenInfo());
    widget->show(blink::WebNavigationPolicyIgnore);
    return widget;
  }
  
  bool RenderFrameImpl::IsPepperAcceptingCompositionEvents() const {
    if (!render_view_->focused_pepper_plugin())
      return false;
    return render_view_->focused_pepper_plugin()->
        IsPluginAcceptingCompositionEvents();
  }
  
  void RenderFrameImpl::PluginCrashed(const base::FilePath& plugin_path,
                                     base::ProcessId plugin_pid) {
    // TODO(jam): dispatch this IPC in RenderFrameHost and switch to use
    // routing_id_ as a result.
    Send(new FrameHostMsg_PluginCrashed(routing_id_, plugin_path, plugin_pid));
  }
  
  void RenderFrameImpl::DidInitiatePaint() {
    // Notify all instances that we painted.  The same caveats apply as for
    // ViewFlushedPaint regarding instances closing themselves, so we take
    // similar precautions.
    PepperPluginSet plugins = active_pepper_instances_;
    for (PepperPluginSet::iterator i = plugins.begin(); i != plugins.end(); ++i) {
      if (active_pepper_instances_.find(*i) != active_pepper_instances_.end())
        (*i)->ViewInitiatedPaint();
    }
  }
  
  void RenderFrameImpl::DidFlushPaint() {
    // Notify all instances that we flushed. This will call into the plugin, and
    // we it may ask to close itself as a result. This will, in turn, modify our
    // set, possibly invalidating the iterator. So we iterate on a copy that
    // won't change out from under us.
    PepperPluginSet plugins = active_pepper_instances_;
    for (PepperPluginSet::iterator i = plugins.begin(); i != plugins.end(); ++i) {
      // The copy above makes sure our iterator is never invalid if some plugins
      // are destroyed. But some plugin may decide to close all of its views in
      // response to a paint in one of them, so we need to make sure each one is
      // still "current" before using it.
      //
      // It's possible that a plugin was destroyed, but another one was created
      // with the same address. In this case, we'll call ViewFlushedPaint on that
      // new plugin. But that's OK for this particular case since we're just
      // notifying all of our instances that the view flushed, and the new one is
      // one of our instances.
      //
      // What about the case where a new one is created in a callback at a new
      // address and we don't issue the callback? We're still OK since this
      // callback is used for flush callbacks and we could not have possibly
      // started a new paint for the new plugin while processing a previous paint
      // for an existing one.
      if (active_pepper_instances_.find(*i) != active_pepper_instances_.end())
        (*i)->ViewFlushedPaint();
    }
  }
  
  PepperPluginInstanceImpl* RenderFrameImpl::GetBitmapForOptimizedPluginPaint(
        const gfx::Rect& paint_bounds,
        TransportDIB** dib,
        gfx::Rect* location,
        gfx::Rect* clip,
        float* scale_factor) {
    for (PepperPluginSet::iterator i = active_pepper_instances_.begin();
         i != active_pepper_instances_.end(); ++i) {
      PepperPluginInstanceImpl* instance = *i;
      // In Flash fullscreen , the plugin contents should be painted onto the
      // fullscreen widget instead of the web page.
      if (!instance->FlashIsFullscreenOrPending() &&
          instance->GetBitmapForOptimizedPluginPaint(paint_bounds, dib, location,
                                                     clip, scale_factor))
        return *i;
    }
    return NULL;
  }
  
  void RenderFrameImpl::PageVisibilityChanged(bool shown) {
    // Inform PPAPI plugins that their page is no longer visible.
    for (PepperPluginSet::iterator i = active_pepper_instances_.begin();
         i != active_pepper_instances_.end(); ++i)
      (*i)->PageVisibilityChanged(shown);
  }
  
  void RenderFrameImpl::OnSetFocus(bool enable) {
    // Notify all Pepper plugins.
    for (PepperPluginSet::iterator i = active_pepper_instances_.begin();
         i != active_pepper_instances_.end(); ++i)
      (*i)->SetContentAreaFocus(enable);
  }
  
  void RenderFrameImpl::WillHandleMouseEvent(const blink::WebMouseEvent& event) {
    // This method is called for every mouse event that the render view receives.
    // And then the mouse event is forwarded to WebKit, which dispatches it to the
    // event target. Potentially a Pepper plugin will receive the event.
    // In order to tell whether a plugin gets the last mouse event and which it
    // is, we set |pepper_last_mouse_event_target_| to NULL here. If a plugin gets
    // the event, it will notify us via DidReceiveMouseEvent() and set itself as
    // |pepper_last_mouse_event_target_|.
    render_view_->set_pepper_last_mouse_event_target(NULL);
  }
  
  void RenderFrameImpl::SimulateImeSetComposition(
      const base::string16& text,
      const std::vector<blink::WebCompositionUnderline>& underlines,
      int selection_start,
      int selection_end) {
    render_view_->OnImeSetComposition(
        text, underlines, selection_start, selection_end);
  }
  
  void RenderFrameImpl::SimulateImeConfirmComposition(
      const base::string16& text,
      const gfx::Range& replacement_range) {
    render_view_->OnImeConfirmComposition(text, replacement_range, false);
  }
  
  
  void RenderFrameImpl::OnImeSetComposition(
      const base::string16& text,
      const std::vector<blink::WebCompositionUnderline>& underlines,
      int selection_start,
      int selection_end) {
    // When a PPAPI plugin has focus, we bypass WebKit.
    if (!IsPepperAcceptingCompositionEvents()) {
      pepper_composition_text_ = text;
    } else {
      // TODO(kinaba) currently all composition events are sent directly to
      // plugins. Use DOM event mechanism after WebKit is made aware about
      // plugins that support composition.
      // The code below mimics the behavior of WebCore::Editor::setComposition.
  
      // Empty -> nonempty: composition started.
      if (pepper_composition_text_.empty() && !text.empty()) {
        render_view_->focused_pepper_plugin()->HandleCompositionStart(
            base::string16());
      }
      // Nonempty -> empty: composition canceled.
      if (!pepper_composition_text_.empty() && text.empty()) {
        render_view_->focused_pepper_plugin()->HandleCompositionEnd(
            base::string16());
      }
      pepper_composition_text_ = text;
      // Nonempty: composition is ongoing.
      if (!pepper_composition_text_.empty()) {
        render_view_->focused_pepper_plugin()->HandleCompositionUpdate(
            pepper_composition_text_, underlines, selection_start,
            selection_end);
      }
    }
  }
  
  void RenderFrameImpl::OnImeConfirmComposition(
      const base::string16& text,
      const gfx::Range& replacement_range,
      bool keep_selection) {
    // When a PPAPI plugin has focus, we bypass WebKit.
    // Here, text.empty() has a special meaning. It means to commit the last
    // update of composition text (see
    // RenderWidgetHost::ImeConfirmComposition()).
    const base::string16& last_text = text.empty() ? pepper_composition_text_
                                                   : text;
  
    // last_text is empty only when both text and pepper_composition_text_ is.
    // Ignore it.
    if (last_text.empty())
      return;
  
    if (!IsPepperAcceptingCompositionEvents()) {
      base::i18n::UTF16CharIterator iterator(&last_text);
      int32 i = 0;
      while (iterator.Advance()) {
        blink::WebKeyboardEvent char_event;
        char_event.type = blink::WebInputEvent::Char;
        char_event.timeStampSeconds = base::Time::Now().ToDoubleT();
        char_event.modifiers = 0;
        char_event.windowsKeyCode = last_text[i];
        char_event.nativeKeyCode = last_text[i];
  
        const int32 char_start = i;
        for (; i < iterator.array_pos(); ++i) {
          char_event.text[i - char_start] = last_text[i];
          char_event.unmodifiedText[i - char_start] = last_text[i];
        }
  
        if (GetRenderWidget()->webwidget())
          GetRenderWidget()->webwidget()->handleInputEvent(char_event);
      }
    } else {
      // Mimics the order of events sent by WebKit.
      // See WebCore::Editor::setComposition() for the corresponding code.
      render_view_->focused_pepper_plugin()->HandleCompositionEnd(last_text);
      render_view_->focused_pepper_plugin()->HandleTextInput(last_text);
    }
    pepper_composition_text_.clear();
  }
  
  #endif  // ENABLE_PLUGINS
  
  bool RenderFrameImpl::Send(IPC::Message* message) {
    if (is_detaching_ ||
        ((is_swapped_out_ || render_view_->is_swapped_out()) &&
         !SwappedOutMessages::CanSendWhileSwappedOut(message))) {
      delete message;
      return false;
    }
  
    return RenderThread::Get()->Send(message);
  }
  
  bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
    ObserverListBase<RenderFrameObserver>::Iterator it(observers_);
    RenderFrameObserver* observer;
    while ((observer = it.GetNext()) != NULL) {
      if (observer->OnMessageReceived(msg))
        return true;
    }
  
    // TODO(ajwong): Fill in with message handlers as various components
    // are migrated over to understand frames.
    return false;
  }
  
  RenderView* RenderFrameImpl::GetRenderView() {
    return render_view_;
  }
  
  int RenderFrameImpl::GetRoutingID() {
    return routing_id_;
  }
  
  WebPreferences& RenderFrameImpl::GetWebkitPreferences() {
    return render_view_->GetWebkitPreferences();
  }
  
  int RenderFrameImpl::ShowContextMenu(ContextMenuClient* client,
                                       const ContextMenuParams& params) {
    return render_view_->ShowContextMenu(client, params);
  }
  
  void RenderFrameImpl::CancelContextMenu(int request_id) {
    return render_view_->CancelContextMenu(request_id);
  }
  
  blink::WebPlugin* RenderFrameImpl::CreatePlugin(
      blink::WebFrame* frame,
      const WebPluginInfo& info,
      const blink::WebPluginParams& params) {
  #if defined(ENABLE_PLUGINS)
    bool pepper_plugin_was_registered = false;
    scoped_refptr<PluginModule> pepper_module(PluginModule::Create(
        this, info, &pepper_plugin_was_registered));
    if (pepper_plugin_was_registered) {
      if (pepper_module.get()) {
        // TODO(jam): change to take RenderFrame.
        return new PepperWebPluginImpl(
            pepper_module.get(), params, render_view_->AsWeakPtr(), this);
      }
    }
  #if defined(OS_CHROMEOS)
    LOG(WARNING) << "Pepper module/plugin creation failed.";
    return NULL;
  #else
    // TODO(jam): change to take RenderFrame.
    return new WebPluginImpl(frame, params, info.path, render_view_->AsWeakPtr(),
                             this);
  #endif
  #else
    return NULL;
  #endif
  }
  
  void RenderFrameImpl::LoadURLExternally(
      blink::WebFrame* frame,
      const blink::WebURLRequest& request,
      blink::WebNavigationPolicy policy) {
    loadURLExternally(frame, request, policy);
  }
  
  // blink::WebFrameClient implementation ----------------------------------------
  
  blink::WebPlugin* RenderFrameImpl::createPlugin(
      blink::WebFrame* frame,
      const blink::WebPluginParams& params) {
    blink::WebPlugin* plugin = NULL;
    if (GetContentClient()->renderer()->OverrideCreatePlugin(
            this, frame, params, &plugin)) {
      return plugin;
    }
  
    if (UTF16ToASCII(params.mimeType) == kBrowserPluginMimeType) {
      return render_view_->GetBrowserPluginManager()->CreateBrowserPlugin(
          render_view_, frame);
    }
  
  #if defined(ENABLE_PLUGINS)
    WebPluginInfo info;
    std::string mime_type;
    bool found = false;
    Send(new FrameHostMsg_GetPluginInfo(
        routing_id_, params.url, frame->top()->document().url(),
        params.mimeType.utf8(), &found, &info, &mime_type));
    if (!found)
      return NULL;
  
    WebPluginParams params_to_use = params;
    params_to_use.mimeType = WebString::fromUTF8(mime_type);
    return CreatePlugin(frame, info, params_to_use);
  #else
    return NULL;
  #endif  // defined(ENABLE_PLUGINS)
  }
  
  blink::WebMediaPlayer* RenderFrameImpl::createMediaPlayer(
      blink::WebFrame* frame,
      const blink::WebURL& url,
      blink::WebMediaPlayerClient* client) {
    // TODO(nasko): Moving the implementation here involves moving a few media
    // related client objects here or referencing them in the RenderView. Needs
    // more work to understand where the proper place for those objects is.
    return render_view_->CreateMediaPlayer(this, frame, url, client);
  }
  
  blink::WebApplicationCacheHost* RenderFrameImpl::createApplicationCacheHost(
      blink::WebFrame* frame,
      blink::WebApplicationCacheHostClient* client) {
    if (!frame || !frame->view())
      return NULL;
    return new RendererWebApplicationCacheHostImpl(
        RenderViewImpl::FromWebView(frame->view()), client,
        RenderThreadImpl::current()->appcache_dispatcher()->backend_proxy());
  }
  
  blink::WebWorkerPermissionClientProxy*
  RenderFrameImpl::createWorkerPermissionClientProxy(WebFrame* frame) {
    if (!frame || !frame->view())
      return NULL;
    return GetContentClient()->renderer()->CreateWorkerPermissionClientProxy(
        RenderViewImpl::FromWebView(frame->view()), frame);
  }
  
  blink::WebCookieJar* RenderFrameImpl::cookieJar(blink::WebFrame* frame) {
    return render_view_->cookieJar(frame);
  }
  
  blink::WebServiceWorkerProvider* RenderFrameImpl::createServiceWorkerProvider(
      blink::WebFrame* frame,
      blink::WebServiceWorkerProviderClient* client) {
    return new WebServiceWorkerProviderImpl(
        ChildThread::current()->thread_safe_sender(),
        make_scoped_ptr(client));
  }
  
  void RenderFrameImpl::didAccessInitialDocument(blink::WebFrame* frame) {
    render_view_->didAccessInitialDocument(frame);
  }
  
  blink::WebFrame* RenderFrameImpl::createChildFrame(
      blink::WebFrame* parent,
      const blink::WebString& name) {
    RenderFrameImpl* child_render_frame = this;
    long long child_frame_identifier = WebFrame::generateEmbedderIdentifier();
    if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess)) {
      // Synchronously notify the browser of a child frame creation to get the
      // routing_id for the RenderFrame.
      int routing_id;
      Send(new FrameHostMsg_CreateChildFrame(routing_id_,
                                             parent->identifier(),
                                             child_frame_identifier,
                                             UTF16ToUTF8(name),
                                             &routing_id));
      child_render_frame = RenderFrameImpl::Create(render_view_, routing_id);
    }
  
    blink::WebFrame* web_frame = WebFrame::create(child_render_frame,
                                                  child_frame_identifier);
  
    if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess)) {
      g_child_frame_map.Get().insert(
          std::make_pair(web_frame, child_render_frame));
    }
  
    return web_frame;
  }
  
  void RenderFrameImpl::didDisownOpener(blink::WebFrame* frame) {
    render_view_->didDisownOpener(frame);
  }
  
  void RenderFrameImpl::frameDetached(blink::WebFrame* frame) {
    // NOTE: This function is called on the frame that is being detached and not
    // the parent frame.  This is different from createChildFrame() which is
    // called on the parent frame.
    CHECK(!is_detaching_);
  
    int64 parent_frame_id = -1;
    if (frame->parent())
      parent_frame_id = frame->parent()->identifier();
  
    Send(new FrameHostMsg_Detach(routing_id_, parent_frame_id,
                                 frame->identifier()));
  
    // Currently multiple WebCore::Frames can send frameDetached to a single
    // RenderFrameImpl. This is legacy behavior from when RenderViewImpl served
    // as a shared WebFrameClient for multiple Webcore::Frame objects. It also
    // prevents this class from entering the |is_detaching_| state because
    // even though one WebCore::Frame may have detached itself, others will
    // still need to use this object.
    if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess)) {
      // The |is_detaching_| flag disables Send(). FrameHostMsg_Detach must be
      // sent before setting |is_detaching_| to true. In contrast, Observers
      // should only be notified afterwards so they cannot call back into and
      // have IPCs fired off.
      is_detaching_ = true;
    }
  
    // Call back to RenderViewImpl for observers to be notified.
    // TODO(nasko): Remove once we have RenderFrameObserver.
    render_view_->frameDetached(frame);
  
    frame->close();
  
    if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess)) {
      // If the frame does not have a parent, it is the main frame. The main
      // frame is owned by the containing RenderViewHost so it does not require
      // any cleanup here.
      if (frame->parent()) {
        FrameMap::iterator it = g_child_frame_map.Get().find(frame);
        DCHECK(it != g_child_frame_map.Get().end());
        DCHECK_EQ(it->second, this);
        g_child_frame_map.Get().erase(it);
        delete this;
        // Object is invalid after this point.
      }
    }
  }
  
  void RenderFrameImpl::willClose(blink::WebFrame* frame) {
    // Call back to RenderViewImpl for observers to be notified.
    // TODO(nasko): Remove once we have RenderFrameObserver.
    render_view_->willClose(frame);
  }
  
  void RenderFrameImpl::didChangeName(blink::WebFrame* frame,
                                      const blink::WebString& name) {
    if (!render_view_->renderer_preferences_.report_frame_name_changes)
      return;
  
    render_view_->Send(
        new ViewHostMsg_UpdateFrameName(render_view_->GetRoutingID(),
                                        frame->identifier(),
                                        !frame->parent(),
                                        UTF16ToUTF8(name)));
  }
  
  void RenderFrameImpl::didMatchCSS(
      blink::WebFrame* frame,
      const blink::WebVector<blink::WebString>& newly_matching_selectors,
      const blink::WebVector<blink::WebString>& stopped_matching_selectors) {
    render_view_->didMatchCSS(
        frame, newly_matching_selectors, stopped_matching_selectors);
  }
  
  void RenderFrameImpl::loadURLExternally(blink::WebFrame* frame,
                                          const blink::WebURLRequest& request,
                                          blink::WebNavigationPolicy policy) {
    loadURLExternally(frame, request, policy, WebString());
  }
  
  void RenderFrameImpl::loadURLExternally(
      blink::WebFrame* frame,
      const blink::WebURLRequest& request,
      blink::WebNavigationPolicy policy,
      const blink::WebString& suggested_name) {
    Referrer referrer(RenderViewImpl::GetReferrerFromRequest(frame, request));
    if (policy == blink::WebNavigationPolicyDownload) {
      render_view_->Send(new ViewHostMsg_DownloadUrl(render_view_->GetRoutingID(),
                                                     request.url(), referrer,
                                                     suggested_name));
    } else {
      render_view_->OpenURL(frame, request.url(), referrer, policy);
    }
  }
  
  blink::WebNavigationPolicy RenderFrameImpl::decidePolicyForNavigation(
      blink::WebFrame* frame,
      blink::WebDataSource::ExtraData* extra_data,
      const blink::WebURLRequest& request,
      blink::WebNavigationType type,
      blink::WebNavigationPolicy default_policy,
      bool is_redirect) {
    return render_view_->decidePolicyForNavigation(
        frame, extra_data, request, type, default_policy, is_redirect);
  }
  
  blink::WebNavigationPolicy RenderFrameImpl::decidePolicyForNavigation(
      blink::WebFrame* frame,
      const blink::WebURLRequest& request,
      blink::WebNavigationType type,
      blink::WebNavigationPolicy default_policy,
      bool is_redirect) {
    return render_view_->decidePolicyForNavigation(
        frame, request, type, default_policy, is_redirect);
  }
  
  void RenderFrameImpl::willSendSubmitEvent(blink::WebFrame* frame,
                                            const blink::WebFormElement& form) {
    // Call back to RenderViewImpl for observers to be notified.
    // TODO(nasko): Remove once we have RenderFrameObserver.
    render_view_->willSendSubmitEvent(frame, form);
  }
  
  void RenderFrameImpl::willSubmitForm(blink::WebFrame* frame,
                                       const blink::WebFormElement& form) {
    DocumentState* document_state =
        DocumentState::FromDataSource(frame->provisionalDataSource());
    NavigationState* navigation_state = document_state->navigation_state();
    InternalDocumentStateData* internal_data =
        InternalDocumentStateData::FromDocumentState(document_state);
  
    if (PageTransitionCoreTypeIs(navigation_state->transition_type(),
                                 PAGE_TRANSITION_LINK)) {
      navigation_state->set_transition_type(PAGE_TRANSITION_FORM_SUBMIT);
    }
  
    // Save these to be processed when the ensuing navigation is committed.
    WebSearchableFormData web_searchable_form_data(form);
    internal_data->set_searchable_form_url(web_searchable_form_data.url());
    internal_data->set_searchable_form_encoding(
        web_searchable_form_data.encoding().utf8());
  
    // Call back to RenderViewImpl for observers to be notified.
    // TODO(nasko): Remove once we have RenderFrameObserver.
    render_view_->willSubmitForm(frame, form);
  }
  
  void RenderFrameImpl::didCreateDataSource(blink::WebFrame* frame,
                                            blink::WebDataSource* datasource) {
    // TODO(nasko): Move implementation here. Needed state:
    // * pending_navigation_params_
    // * webview
    // Needed methods:
    // * PopulateDocumentStateFromPending
    // * CreateNavigationStateFromPending
    render_view_->didCreateDataSource(frame, datasource);
  }
  
  void RenderFrameImpl::didStartProvisionalLoad(blink::WebFrame* frame) {
    WebDataSource* ds = frame->provisionalDataSource();
  
    // In fast/loader/stop-provisional-loads.html, we abort the load before this
    // callback is invoked.
    if (!ds)
      return;
  
    DocumentState* document_state = DocumentState::FromDataSource(ds);
  
    // We should only navigate to swappedout:// when is_swapped_out_ is true.
    CHECK((ds->request().url() != GURL(kSwappedOutURL)) ||
          render_view_->is_swapped_out()) <<
          "Heard swappedout:// when not swapped out.";
  
    // Update the request time if WebKit has better knowledge of it.
    if (document_state->request_time().is_null()) {
      double event_time = ds->triggeringEventTime();
      if (event_time != 0.0)
        document_state->set_request_time(Time::FromDoubleT(event_time));
    }
  
    // Start time is only set after request time.
    document_state->set_start_load_time(Time::Now());
  
    bool is_top_most = !frame->parent();
    if (is_top_most) {
      render_view_->set_navigation_gesture(
          WebUserGestureIndicator::isProcessingUserGesture() ?
              NavigationGestureUser : NavigationGestureAuto);
    } else if (ds->replacesCurrentHistoryItem()) {
      // Subframe navigations that don't add session history items must be
      // marked with AUTO_SUBFRAME. See also didFailProvisionalLoad for how we
      // handle loading of error pages.
      document_state->navigation_state()->set_transition_type(
          PAGE_TRANSITION_AUTO_SUBFRAME);
    }
  
    FOR_EACH_OBSERVER(
        RenderViewObserver, render_view_->observers(),
        DidStartProvisionalLoad(frame));
  
    Send(new FrameHostMsg_DidStartProvisionalLoadForFrame(
         routing_id_, frame->identifier(),
         frame->parent() ? frame->parent()->identifier() : -1,
         is_top_most, ds->request().url()));
  }
  
  void RenderFrameImpl::didReceiveServerRedirectForProvisionalLoad(
      blink::WebFrame* frame) {
    // TODO(nasko): Move implementation here. Needed state:
    // * page_id_
    render_view_->didReceiveServerRedirectForProvisionalLoad(frame);
  }
  
  void RenderFrameImpl::didFailProvisionalLoad(
      blink::WebFrame* frame,
      const blink::WebURLError& error) {
    // TODO(nasko): Move implementation here. Needed state:
    // * page_id_
    // * pending_navigation_params_
    // Needed methods
    // * MaybeLoadAlternateErrorPage
    // * LoadNavigationErrorPage
    render_view_->didFailProvisionalLoad(frame, error);
  }
  
  void RenderFrameImpl::didCommitProvisionalLoad(blink::WebFrame* frame,
                                                 bool is_new_navigation) {
    // TODO(nasko): Move implementation here. Needed state:
    // * page_id_
    // * next_page_id_
    // * history_list_offset_
    // * history_list_length_
    // * history_page_ids_
    // Needed methods
    // * webview
    // * UpdateSessionHistory
    // * GetLoadingUrl
    render_view_->didCommitProvisionalLoad(frame, is_new_navigation);
  }
  
  void RenderFrameImpl::didClearWindowObject(blink::WebFrame* frame) {
    // TODO(nasko): Move implementation here. Needed state:
    // * enabled_bindings_
    // * dom_automation_controller_
    // * stats_collection_controller_
    render_view_->didClearWindowObject(frame);
  }
  
  void RenderFrameImpl::didCreateDocumentElement(blink::WebFrame* frame) {
    // Notify the browser about non-blank documents loading in the top frame.
    GURL url = frame->document().url();
    if (url.is_valid() && url.spec() != kAboutBlankURL) {
      // TODO(nasko): Check if webview()->mainFrame() is the same as the
      // frame->tree()->top().
      if (frame == render_view_->webview()->mainFrame()) {
        render_view_->Send(new ViewHostMsg_DocumentAvailableInMainFrame(
            render_view_->GetRoutingID()));
      }
    }
  
    // Call back to RenderViewImpl for observers to be notified.
    // TODO(nasko): Remove once we have RenderFrameObserver.
    render_view_->didCreateDocumentElement(frame);
  }
  
  void RenderFrameImpl::didReceiveTitle(blink::WebFrame* frame,
                                        const blink::WebString& title,
                                        blink::WebTextDirection direction) {
    // TODO(nasko): Investigate wheather implementation should move here.
    render_view_->didReceiveTitle(frame, title, direction);
  }
  
  void RenderFrameImpl::didChangeIcon(blink::WebFrame* frame,
                                      blink::WebIconURL::Type icon_type) {
    // TODO(nasko): Investigate wheather implementation should move here.
    render_view_->didChangeIcon(frame, icon_type);
  }
  
  void RenderFrameImpl::didFinishDocumentLoad(blink::WebFrame* frame) {
    // TODO(nasko): Move implementation here. No state needed, just observers
    // notification in before updating encoding.
    render_view_->didFinishDocumentLoad(frame);
  }
  
  void RenderFrameImpl::didHandleOnloadEvents(blink::WebFrame* frame) {
    // TODO(nasko): Move implementation here. Needed state:
    // * page_id_
    render_view_->didHandleOnloadEvents(frame);
  }
  
  void RenderFrameImpl::didFailLoad(blink::WebFrame* frame,
                                    const blink::WebURLError& error) {
    // TODO(nasko): Move implementation here. No state needed.
    render_view_->didFailLoad(frame, error);
  }
  
  void RenderFrameImpl::didFinishLoad(blink::WebFrame* frame) {
    // TODO(nasko): Move implementation here. No state needed, just observers
    // notification before sending message to the browser process.
    render_view_->didFinishLoad(frame);
  }
  
  void RenderFrameImpl::didNavigateWithinPage(blink::WebFrame* frame,
                                              bool is_new_navigation) {
    // TODO(nasko): Move implementation here. No state needed, just observers
    // notification before sending message to the browser process.
    render_view_->didNavigateWithinPage(frame, is_new_navigation);
  }
  
  void RenderFrameImpl::didUpdateCurrentHistoryItem(blink::WebFrame* frame) {
    // TODO(nasko): Move implementation here. Needed methods:
    // * StartNavStateSyncTimerIfNecessary
    render_view_->didUpdateCurrentHistoryItem(frame);
  }
  
  void RenderFrameImpl::willRequestAfterPreconnect(
      blink::WebFrame* frame,
      blink::WebURLRequest& request) {
    blink::WebReferrerPolicy referrer_policy = blink::WebReferrerPolicyDefault;
    WebString custom_user_agent;
  
    if (request.extraData()) {
      // This will only be called before willSendRequest, so only ExtraData
      // members we have to copy here is on WebURLRequestExtraDataImpl.
      webkit_glue::WebURLRequestExtraDataImpl* old_extra_data =
          static_cast<webkit_glue::WebURLRequestExtraDataImpl*>(
              request.extraData());
  
      referrer_policy = old_extra_data->referrer_policy();
      custom_user_agent = old_extra_data->custom_user_agent();
    }
  
    bool was_after_preconnect_request = true;
    // The args after |was_after_preconnect_request| are not used, and set to
    // correct values at |willSendRequest|.
    request.setExtraData(new webkit_glue::WebURLRequestExtraDataImpl(
        referrer_policy, custom_user_agent, was_after_preconnect_request));
  }
  
  void RenderFrameImpl::willSendRequest(
      blink::WebFrame* frame,
      unsigned identifier,
      blink::WebURLRequest& request,
      const blink::WebURLResponse& redirect_response) {
    // The request my be empty during tests.
    if (request.url().isEmpty())
      return;
  
    WebFrame* top_frame = frame->top();
    if (!top_frame)
      top_frame = frame;
    WebDataSource* provisional_data_source = top_frame->provisionalDataSource();
    WebDataSource* top_data_source = top_frame->dataSource();
    WebDataSource* data_source =
        provisional_data_source ? provisional_data_source : top_data_source;
  
    PageTransition transition_type = PAGE_TRANSITION_LINK;
    DocumentState* document_state = DocumentState::FromDataSource(data_source);
    DCHECK(document_state);
    InternalDocumentStateData* internal_data =
        InternalDocumentStateData::FromDocumentState(document_state);
    NavigationState* navigation_state = document_state->navigation_state();
    transition_type = navigation_state->transition_type();
  
    GURL request_url(request.url());
    GURL new_url;
    if (GetContentClient()->renderer()->WillSendRequest(
            frame,
            transition_type,
            request_url,
            request.firstPartyForCookies(),
            &new_url)) {
      request.setURL(WebURL(new_url));
    }
  
    if (internal_data->is_cache_policy_override_set())
      request.setCachePolicy(internal_data->cache_policy_override());
  
    blink::WebReferrerPolicy referrer_policy;
    if (internal_data->is_referrer_policy_set()) {
      referrer_policy = internal_data->referrer_policy();
      internal_data->clear_referrer_policy();
    } else {
      referrer_policy = frame->document().referrerPolicy();
    }
  
    // The request's extra data may indicate that we should set a custom user
    // agent. This needs to be done here, after WebKit is through with setting the
    // user agent on its own.
    WebString custom_user_agent;
    bool was_after_preconnect_request = false;
    if (request.extraData()) {
      webkit_glue::WebURLRequestExtraDataImpl* old_extra_data =
          static_cast<webkit_glue::WebURLRequestExtraDataImpl*>(
              request.extraData());
      custom_user_agent = old_extra_data->custom_user_agent();
      was_after_preconnect_request =
          old_extra_data->was_after_preconnect_request();
  
      if (!custom_user_agent.isNull()) {
        if (custom_user_agent.isEmpty())
          request.clearHTTPHeaderField("User-Agent");
        else
          request.setHTTPHeaderField("User-Agent", custom_user_agent);
      }
    }
  
    // Attach |should_replace_current_entry| state to requests so that, should
    // this navigation later require a request transfer, all state is preserved
    // when it is re-created in the new process.
    bool should_replace_current_entry = false;
    if (navigation_state->is_content_initiated()) {
      should_replace_current_entry = data_source->replacesCurrentHistoryItem();
    } else {
      // If the navigation is browser-initiated, the NavigationState contains the
      // correct value instead of the WebDataSource.
      //
      // TODO(davidben): Avoid this awkward duplication of state. See comment on
      // NavigationState::should_replace_current_entry().
      should_replace_current_entry =
          navigation_state->should_replace_current_entry();
    }
    request.setExtraData(
        new RequestExtraData(referrer_policy,
                             custom_user_agent,
                             was_after_preconnect_request,
                             routing_id_,
                             (frame == top_frame),
                             frame->identifier(),
                             GURL(frame->document().securityOrigin().toString()),
                             frame->parent() == top_frame,
                             frame->parent() ? frame->parent()->identifier() : -1,
                             navigation_state->allow_download(),
                             transition_type,
                             should_replace_current_entry,
                             navigation_state->transferred_request_child_id(),
                             navigation_state->transferred_request_request_id()));
  
    DocumentState* top_document_state =
        DocumentState::FromDataSource(top_data_source);
    if (top_document_state) {
      // TODO(gavinp): separate out prefetching and prerender field trials
      // if the rel=prerender rel type is sticking around.
      if (request.targetType() == WebURLRequest::TargetIsPrefetch)
        top_document_state->set_was_prefetcher(true);
  
      if (was_after_preconnect_request)
        top_document_state->set_was_after_preconnect_request(true);
    }
  
    // This is an instance where we embed a copy of the routing id
    // into the data portion of the message. This can cause problems if we
    // don't register this id on the browser side, since the download manager
    // expects to find a RenderViewHost based off the id.
    request.setRequestorID(render_view_->GetRoutingID());
    request.setHasUserGesture(WebUserGestureIndicator::isProcessingUserGesture());
  
    if (!navigation_state->extra_headers().empty()) {
      for (net::HttpUtil::HeadersIterator i(
          navigation_state->extra_headers().begin(),
          navigation_state->extra_headers().end(), "\n");
          i.GetNext(); ) {
        request.setHTTPHeaderField(WebString::fromUTF8(i.name()),
                                   WebString::fromUTF8(i.values()));
      }
    }
  
    if (!render_view_->renderer_preferences_.enable_referrers)
      request.clearHTTPHeaderField("Referer");
  }
  
  void RenderFrameImpl::didReceiveResponse(
      blink::WebFrame* frame,
      unsigned identifier,
      const blink::WebURLResponse& response) {
    // Only do this for responses that correspond to a provisional data source
    // of the top-most frame.  If we have a provisional data source, then we
    // can't have any sub-resources yet, so we know that this response must
    // correspond to a frame load.
    if (!frame->provisionalDataSource() || frame->parent())
      return;
  
    // If we are in view source mode, then just let the user see the source of
    // the server's error page.
    if (frame->isViewSourceModeEnabled())
      return;
  
    DocumentState* document_state =
        DocumentState::FromDataSource(frame->provisionalDataSource());
    int http_status_code = response.httpStatusCode();
  
    // Record page load flags.
    WebURLResponseExtraDataImpl* extra_data =
        RenderViewImpl::GetExtraDataFromResponse(response);
    if (extra_data) {
      document_state->set_was_fetched_via_spdy(
          extra_data->was_fetched_via_spdy());
      document_state->set_was_npn_negotiated(
          extra_data->was_npn_negotiated());
      document_state->set_npn_negotiated_protocol(
          extra_data->npn_negotiated_protocol());
      document_state->set_was_alternate_protocol_available(
          extra_data->was_alternate_protocol_available());
      document_state->set_connection_info(
          extra_data->connection_info());
      document_state->set_was_fetched_via_proxy(
          extra_data->was_fetched_via_proxy());
    }
    InternalDocumentStateData* internal_data =
        InternalDocumentStateData::FromDocumentState(document_state);
    internal_data->set_http_status_code(http_status_code);
    // Whether or not the http status code actually corresponds to an error is
    // only checked when the page is done loading, if |use_error_page| is
    // still true.
    internal_data->set_use_error_page(true);
  }
  
  void RenderFrameImpl::didFinishResourceLoad(blink::WebFrame* frame,
                                              unsigned identifier) {
    // TODO(nasko): Move implementation here. Needed state:
    // * devtools_agent_
    // Needed methods:
    // * LoadNavigationErrorPage
    render_view_->didFinishResourceLoad(frame, identifier);
  }
  
  void RenderFrameImpl::didLoadResourceFromMemoryCache(
      blink::WebFrame* frame,
      const blink::WebURLRequest& request,
      const blink::WebURLResponse& response) {
    // The recipients of this message have no use for data: URLs: they don't
    // affect the page's insecure content list and are not in the disk cache. To
    // prevent large (1M+) data: URLs from crashing in the IPC system, we simply
    // filter them out here.
    GURL url(request.url());
    if (url.SchemeIs("data"))
      return;
  
    // Let the browser know we loaded a resource from the memory cache.  This
    // message is needed to display the correct SSL indicators.
    render_view_->Send(new ViewHostMsg_DidLoadResourceFromMemoryCache(
        render_view_->GetRoutingID(),
        url,
        response.securityInfo(),
        request.httpMethod().utf8(),
        response.mimeType().utf8(),
        ResourceType::FromTargetType(request.targetType())));
  }
  
  void RenderFrameImpl::didDisplayInsecureContent(blink::WebFrame* frame) {
    render_view_->Send(new ViewHostMsg_DidDisplayInsecureContent(
        render_view_->GetRoutingID()));
  }
  
  void RenderFrameImpl::didRunInsecureContent(
      blink::WebFrame* frame,
      const blink::WebSecurityOrigin& origin,
      const blink::WebURL& target) {
    render_view_->Send(new ViewHostMsg_DidRunInsecureContent(
        render_view_->GetRoutingID(),
        origin.toString().utf8(),
        target));
  }
  
  void RenderFrameImpl::didAbortLoading(blink::WebFrame* frame) {
  #if defined(ENABLE_PLUGINS)
    if (frame != render_view_->webview()->mainFrame())
      return;
    PluginChannelHost::Broadcast(
        new PluginHostMsg_DidAbortLoading(render_view_->GetRoutingID()));
  #endif
  }
  
  void RenderFrameImpl::didExhaustMemoryAvailableForScript(
      blink::WebFrame* frame) {
    render_view_->Send(new ViewHostMsg_JSOutOfMemory(
        render_view_->GetRoutingID()));
  }
  
  void RenderFrameImpl::didCreateScriptContext(blink::WebFrame* frame,
                                               v8::Handle<v8::Context> context,
                                               int extension_group,
                                               int world_id) {
    GetContentClient()->renderer()->DidCreateScriptContext(
        frame, context, extension_group, world_id);
  }
  
  void RenderFrameImpl::willReleaseScriptContext(blink::WebFrame* frame,
                                                 v8::Handle<v8::Context> context,
                                                 int world_id) {
    GetContentClient()->renderer()->WillReleaseScriptContext(
        frame, context, world_id);
  }
  
  void RenderFrameImpl::didFirstVisuallyNonEmptyLayout(blink::WebFrame* frame) {
    render_view_->didFirstVisuallyNonEmptyLayout(frame);
  }
  
  void RenderFrameImpl::didChangeContentsSize(blink::WebFrame* frame,
                                              const blink::WebSize& size) {
    // TODO(nasko): Move implementation here. Needed state:
    // * cached_has_main_frame_horizontal_scrollbar_
    // * cached_has_main_frame_vertical_scrollbar_
    render_view_->didChangeContentsSize(frame, size);
  }
  
  void RenderFrameImpl::didChangeScrollOffset(blink::WebFrame* frame) {
    // TODO(nasko): Move implementation here. Needed methods:
    // * StartNavStateSyncTimerIfNecessary
    render_view_->didChangeScrollOffset(frame);
  }
  
  void RenderFrameImpl::willInsertBody(blink::WebFrame* frame) {
    if (!frame->parent()) {
      render_view_->Send(new ViewHostMsg_WillInsertBody(
          render_view_->GetRoutingID()));
    }
  }
  
  void RenderFrameImpl::reportFindInPageMatchCount(int request_id,
                                                   int count,
                                                   bool final_update) {
    int active_match_ordinal = -1;  // -1 = don't update active match ordinal
    if (!count)
      active_match_ordinal = 0;
  
    render_view_->Send(new ViewHostMsg_Find_Reply(
        render_view_->GetRoutingID(), request_id, count,
        gfx::Rect(), active_match_ordinal, final_update));
  }
  
  void RenderFrameImpl::reportFindInPageSelection(
      int request_id,
      int active_match_ordinal,
      const blink::WebRect& selection_rect) {
    render_view_->Send(new ViewHostMsg_Find_Reply(
        render_view_->GetRoutingID(), request_id, -1, selection_rect,
        active_match_ordinal, false));
  }
  
  void RenderFrameImpl::requestStorageQuota(
      blink::WebFrame* frame,
      blink::WebStorageQuotaType type,
      unsigned long long requested_size,
      blink::WebStorageQuotaCallbacks* callbacks) {
    DCHECK(frame);
    WebSecurityOrigin origin = frame->document().securityOrigin();
    if (origin.isUnique()) {
      // Unique origins cannot store persistent state.
      callbacks->didFail(blink::WebStorageQuotaErrorAbort);
      return;
    }
    ChildThread::current()->quota_dispatcher()->RequestStorageQuota(
        render_view_->GetRoutingID(), GURL(origin.toString()),
        static_cast<quota::StorageType>(type), requested_size,
        QuotaDispatcher::CreateWebStorageQuotaCallbacksWrapper(callbacks));
  }
  
  void RenderFrameImpl::willOpenSocketStream(
      blink::WebSocketStreamHandle* handle) {
    SocketStreamHandleData::AddToHandle(handle, render_view_->GetRoutingID());
  }
  
  void RenderFrameImpl::willStartUsingPeerConnectionHandler(
      blink::WebFrame* frame,
      blink::WebRTCPeerConnectionHandler* handler) {
  #if defined(ENABLE_WEBRTC)
    static_cast<RTCPeerConnectionHandler*>(handler)->associateWithFrame(frame);
  #endif
  }
  
  bool RenderFrameImpl::willCheckAndDispatchMessageEvent(
      blink::WebFrame* sourceFrame,
      blink::WebFrame* targetFrame,
      blink::WebSecurityOrigin targetOrigin,
      blink::WebDOMMessageEvent event) {
    // TODO(nasko): Move implementation here. Needed state:
    // * is_swapped_out_
    return render_view_->willCheckAndDispatchMessageEvent(
        sourceFrame, targetFrame, targetOrigin, event);
  }
  
  blink::WebString RenderFrameImpl::userAgentOverride(
      blink::WebFrame* frame,
      const blink::WebURL& url) {
    if (!render_view_->webview() || !render_view_->webview()->mainFrame() ||
        render_view_->renderer_preferences_.user_agent_override.empty()) {
      return blink::WebString();
    }
  
    // If we're in the middle of committing a load, the data source we need
    // will still be provisional.
    WebFrame* main_frame = render_view_->webview()->mainFrame();
    WebDataSource* data_source = NULL;
    if (main_frame->provisionalDataSource())
      data_source = main_frame->provisionalDataSource();
    else
      data_source = main_frame->dataSource();
  
    InternalDocumentStateData* internal_data = data_source ?
        InternalDocumentStateData::FromDataSource(data_source) : NULL;
    if (internal_data && internal_data->is_overriding_user_agent())
      return WebString::fromUTF8(
          render_view_->renderer_preferences_.user_agent_override);
    return blink::WebString();
  }
  
  blink::WebString RenderFrameImpl::doNotTrackValue(blink::WebFrame* frame) {
    if (render_view_->renderer_preferences_.enable_do_not_track)
      return WebString::fromUTF8("1");
    return WebString();
  }
  
  bool RenderFrameImpl::allowWebGL(blink::WebFrame* frame, bool default_value) {
    if (!default_value)
      return false;
  
    bool blocked = true;
    render_view_->Send(new ViewHostMsg_Are3DAPIsBlocked(
        render_view_->GetRoutingID(),
        GURL(frame->top()->document().securityOrigin().toString()),
        THREE_D_API_TYPE_WEBGL,
        &blocked));
    return !blocked;
  }
  
  void RenderFrameImpl::didLoseWebGLContext(blink::WebFrame* frame,
                                            int arb_robustness_status_code) {
    render_view_->Send(new ViewHostMsg_DidLose3DContext(
        GURL(frame->top()->document().securityOrigin().toString()),
        THREE_D_API_TYPE_WEBGL,
        arb_robustness_status_code));
  }
  
  void RenderFrameImpl::AddObserver(RenderFrameObserver* observer) {
    observers_.AddObserver(observer);
  }
  
  void RenderFrameImpl::RemoveObserver(RenderFrameObserver* observer) {
    observer->RenderFrameGone();
    observers_.RemoveObserver(observer);
  }
  
  }  // namespace content
  