ash: Minor cleanup, move more files from launcher to shelf.

ash/shelf/overflow_button.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 ASH_LAUNCHER_OVERFLOW_BUTTON_H_
-#define ASH_LAUNCHER_OVERFLOW_BUTTON_H_
+#ifndef ASH_SHELF_OVERFLOW_BUTTON_H_
+#define ASH_SHELF_OVERFLOW_BUTTON_H_
 
 #include "ash/shelf/shelf_types.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/controls/button/custom_button.h"
 
 namespace ash {
 namespace internal {
 
@@ skipping 17 matching lines @@
   gfx::ImageSkia right_image_;
   // Bottom image is owned by the resource bundle.
   const gfx::ImageSkia* bottom_image_;
 
   DISALLOW_COPY_AND_ASSIGN(OverflowButton);
 };
 
 }  // namespace internal
 }  // namespace ash
 
-#endif  // ASH_LAUNCHER_OVERFLOW_BUTTON_H_
+#endif  // ASH_SHELF_OVERFLOW_BUTTON_H_