text: // Copyright 2014 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.
  
  #ifndef CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_
  #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_
  
  #include "base/basictypes.h"
  #include "base/memory/ref_counted.h"
  #include "content/browser/frame_host/navigation_request_info.h"
  #include "content/common/content_export.h"
  
  namespace content {
  class ResourceRequestBody;
  
  // PlzNavigate
  // A UI thread object that owns a navigation request until it commits. It
  // ensures the UI thread can start a navigation request in the
  // ResourceDispatcherHost (that lives on the IO thread).
  // TODO(clamy): Describe the interactions between the UI and IO thread during
  // the navigation following its refactoring.
  class NavigationRequest {
   public:
    NavigationRequest(const NavigationRequestInfo& info,
                      int64 frame_tree_node_id);
  
    ~NavigationRequest();
  
    // Called on the UI thread by the RenderFrameHostManager which owns the
    // NavigationRequest. After calling this function, |body| can no longer be
    // manipulated on the UI thread.
    void BeginNavigation(scoped_refptr<ResourceRequestBody> body);
  
    // Called on the UI thread by the RenderFrameHostManager which owns the
    // NavigationRequest whenever this navigation request should be canceled.
    void CancelNavigation();
  
    const NavigationRequestInfo& info() const { return info_; }
  
    int64 frame_tree_node_id() const { return frame_tree_node_id_; }
  
    int64 navigation_request_id() const { return navigation_request_id_; }
  
   private:
    const int64 navigation_request_id_;
    const NavigationRequestInfo info_;
    const int64 frame_tree_node_id_;
  
    DISALLOW_COPY_AND_ASSIGN(NavigationRequest);
  };
  
  }  // namespace content
  
  #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_
  