chromeos: Implement power button animations for Aura.

ui/aura/root_window.h

Index: ui/aura/root_window.h
diff --git a/ui/aura/root_window.h b/ui/aura/root_window.h
index b3e91ec301e4f60532b60a5dedc886202f658002..1355ab41688721be844590b7e397daa66e5793db 100644
--- a/ui/aura/root_window.h
+++ b/ui/aura/root_window.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -144,7 +144,7 @@ class AURA_EXPORT RootWindow : public ui::CompositorDelegate,
 #endif
 
   // Overridden from ui::CompositorDelegate:
-  virtual void ScheduleDraw();
+  virtual void ScheduleDraw() OVERRIDE;
 
  private:
   RootWindow();