Add brightness/grayscale animations and use them for OOBE boot transition

ash/shell.cc

 // 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 "ash/shell.h"
 
 #include <algorithm>
 #include <string>
 
 #include "ash/accelerators/focus_manager_factory.h"
@@ skipping 99 matching lines @@
 using views::Widget;
 
 // This dummy class is used for shell unit tests. We dont have chrome delegate
 // in these tests.
 class DummyUserWallpaperDelegate : public UserWallpaperDelegate {
  public:
   DummyUserWallpaperDelegate() {}
 
   virtual ~DummyUserWallpaperDelegate() {}
 
+  virtual ash::WindowVisibilityAnimationType GetAnimationType() OVERRIDE {
+    return WINDOW_VISIBILITY_ANIMATION_TYPE_FADE;
+  }
+
   virtual void InitializeWallpaper() OVERRIDE {
     ash::Shell::GetInstance()->desktop_background_controller()->
         CreateEmptyWallpaper();
   }
 
   virtual void OpenSetWallpaperPage() OVERRIDE {
   }
 
   virtual bool CanOpenSetWallpaperPage() OVERRIDE {
     return false;
@@ skipping 645 matching lines @@
 }
 
 void Shell::ShowCursor(bool visible) {
   RootWindowList root_windows = GetAllRootWindows();
   for (RootWindowList::iterator iter = root_windows.begin();
        iter != root_windows.end(); ++iter)
     (*iter)->ShowCursor(visible);
 }
 
 }  // namespace ash