Notify launcher page with onTransitionChanged event

chrome/browser/ui/app_list/app_list_view_delegate.h

Index: chrome/browser/ui/app_list/app_list_view_delegate.h
diff --git a/chrome/browser/ui/app_list/app_list_view_delegate.h b/chrome/browser/ui/app_list/app_list_view_delegate.h
index 1eb50ba929266252317277b68ec9eed3c40478db..906d54c36296b120ed8803445a8eeaaff728fbe5 100644
--- a/chrome/browser/ui/app_list/app_list_view_delegate.h
+++ b/chrome/browser/ui/app_list/app_list_view_delegate.h
@@ -31,6 +31,7 @@ class CustomLauncherPageContents;
 }
 
 namespace app_list {
+class LauncherPageEventDispatcherViews;
 class SearchController;
 class SearchResourceManager;
 class SpeechUIModel;
@@ -84,6 +85,7 @@ class AppListViewDelegate : public app_list::AppListViewDelegate,
   base::TimeDelta GetAutoLaunchTimeout() override;
   void AutoLaunchCanceled() override;
   void ViewInitialized() override;
+  void ViewReinitializedForProfileChange() override;
   void Dismiss() override;
   void ViewClosing() override;
   gfx::ImageSkia GetWindowIcon() override;
@@ -113,6 +115,9 @@ class AppListViewDelegate : public app_list::AppListViewDelegate,
   // Updates the app list's custom launcher pages for the current |profile_|.
   void SetUpCustomLauncherPages();
 
+  // Attaches the launcher page event dispatcher to the custom launcher page.
+  void AttachLauncherPageEventDispatcher();
+
   // Overridden from app_list::StartPageObserver:
   void OnSpeechResult(const base::string16& result, bool is_final) override;
   void OnSpeechSoundLevelChanged(int16 level) override;
@@ -179,6 +184,12 @@ class AppListViewDelegate : public app_list::AppListViewDelegate,
   // Window contents of additional custom launcher pages.
   ScopedVector<apps::CustomLauncherPageContents> custom_page_contents_;
 
+#if defined(TOOLKIT_VIEWS)
+  // Observes the app list to send events to the launcher page.
+  scoped_ptr<app_list::LauncherPageEventDispatcherViews>
+      launcher_page_event_dispatcher_;
+#endif
+
   // Registers for NOTIFICATION_APP_TERMINATING to unload custom launcher pages.
   content::NotificationRegistrar registrar_;