Notify launcher page with onTransitionChanged event

chrome/browser/ui/app_list/app_list_view_delegate.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 #define CHROME_BROWSER_UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 86 matching lines @@
   virtual std::vector<views::View*> CreateCustomPageWebViews(
       const gfx::Size& size) override;
 #endif
   bool IsSpeechRecognitionEnabled() override;
   const Users& GetUsers() const override;
   bool ShouldCenterWindow() const override;
   void AddObserver(app_list::AppListViewDelegateObserver* observer) override;
   void RemoveObserver(app_list::AppListViewDelegateObserver* observer) override;
 
  private:
+  class LauncherPageEventDispatcher;
+
   // Updates the speech webview and start page for the current |profile_|.
   void SetUpSearchUI();
 
   // Updates the app list's ProfileMenuItems for the current |profile_|.
   void SetUpProfileSwitcher();
 
   // Updates the app list's custom launcher pages for the current |profile_|.
   void SetUpCustomLauncherPages();
 
   // Overridden from app_list::StartPageObserver:
@@ skipping 54 matching lines @@
 #endif
 
   ObserverList<app_list::AppListViewDelegateObserver> observers_;
 
   // Used to track the SigninManagers that this instance is observing so that
   // this instance can be removed as an observer on its destruction.
   ScopedObserver<SigninManagerBase, AppListViewDelegate> scoped_observer_;
 
   // Window contents of additional custom launcher pages.
   ScopedVector<apps::CustomLauncherPageContents> custom_page_contents_;
+  scoped_ptr<LauncherPageEventDispatcher> launcher_page_event_dispatcher_;
 
   // Registers for NOTIFICATION_APP_TERMINATING to unload custom launcher pages.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListViewDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_