text: // Copyright (c) 2012 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 "chrome/browser/ui/webui/ntp/android/new_tab_page_ready_handler.h"
  
  #include "base/bind.h"
  #include "base/logging.h"
  #include "base/values.h"
  #include "chrome/common/chrome_notification_types.h"
  #include "content/public/browser/notification_service.h"
  #include "content/public/browser/web_contents.h"
  #include "content/public/browser/web_ui.h"
  
  NewTabPageReadyHandler::NewTabPageReadyHandler() {
  }
  
  NewTabPageReadyHandler::~NewTabPageReadyHandler() {
  }
  
  void NewTabPageReadyHandler::RegisterMessages() {
    web_ui()->RegisterMessageCallback("notifyNTPReady", base::Bind(
        &NewTabPageReadyHandler::HandleNewTabPageReady, base::Unretained(this)));
    web_ui()->RegisterMessageCallback("NTPUnexpectedNavigation", base::Bind(
        &NewTabPageReadyHandler::HandleNewTabPageUnexpectedNavigation,
        base::Unretained(this)));
  }
  
  void NewTabPageReadyHandler::HandleNewTabPageReady(
      const ListValue* args) {
    content::NotificationService::current()->Notify(
        chrome::NOTIFICATION_NEW_TAB_READY,
        content::Source<content::WebContents>(web_ui()->GetWebContents()),
        content::NotificationService::NoDetails());
  }
  
  void NewTabPageReadyHandler::HandleNewTabPageUnexpectedNavigation(
      const ListValue* args) {
    // NTP reached an unexpected state trying to send finish loading notification
    // a second time.  The notification should be sent only when page is
    // completely done loading. This could otherwise create a race condition in
    // tests waiting for the NTP to have loaded (any navigation NTP does after
    // loading could interfere with the test navigation).
    NOTREACHED();
  }
  