Skeleton for app_list on OSX, and refactoring for enable_app_list=1 on OS=="mac".

ui/app_list/views/app_list_background.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 UI_APP_LIST_APP_LIST_BACKGROUND_H_
-#define UI_APP_LIST_APP_LIST_BACKGROUND_H_
+#ifndef UI_APP_LIST_APP_LIST_VIEWS_BACKGROUND_H_
+#define UI_APP_LIST_APP_LIST_VIEWS_BACKGROUND_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/views/background.h"
 
 namespace views {
 class View;
 }
 
 namespace app_list {
@@ skipping 10 matching lines @@
   virtual void Paint(gfx::Canvas* canvas, views::View* view) const OVERRIDE;
 
   const int corner_radius_;
   const views::View* search_box_view_;  // Owned by views hierarchy.
 
   DISALLOW_COPY_AND_ASSIGN(AppListBackground);
 };
 
 }  // namespace app_list
 
-#endif  // UI_APP_LIST_APP_LIST_BACKGROUND_H_
+#endif  // UI_APP_LIST_APP_LIST_VIEWS_BACKGROUND_H_