Notify launcher page with onTransitionChanged event

ui/app_list/test/app_list_test_view_delegate.h

 // 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.
 
 #ifndef UI_APP_LIST_TEST_APP_LIST_TEST_VIEW_DELEGATE_H_
 #define UI_APP_LIST_TEST_APP_LIST_TEST_VIEW_DELEGATE_H_
 
 #include <map>
 #include <string>
 
@@ skipping 60 matching lines @@
   gfx::ImageSkia GetWindowIcon() override;
   void OpenSettings() override {}
   void OpenHelp() override {}
   void OpenFeedback() override {}
   void ToggleSpeechRecognition() override;
   void ShowForProfileByPath(const base::FilePath& profile_path) override {}
 #if defined(TOOLKIT_VIEWS)
   views::View* CreateStartPageWebView(const gfx::Size& size) override;
   std::vector<views::View*> CreateCustomPageWebViews(
       const gfx::Size& size) override;
+  void CustomLauncherPageAnimationChanged(double progress) override {}
 #endif
   bool IsSpeechRecognitionEnabled() override;
   const Users& GetUsers() const override;
   bool ShouldCenterWindow() const override;
   void AddObserver(AppListViewDelegateObserver* observer) override;
   void RemoveObserver(AppListViewDelegateObserver* observer) override;
 
   // Do a bulk replacement of the items in the model.
   void ReplaceTestModel(int item_count);
 
@@ skipping 12 matching lines @@
   SpeechUIModel speech_ui_;
   base::TimeDelta auto_launch_timeout_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListTestViewDelegate);
 };
 
 }  // namespace test
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_TEST_APP_LIST_TEST_VIEW_DELEGATE_H_