mash: Migrate some system user files to common.

ash/common/system/user/button_from_view.h

 // Copyright 2014 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_SYSTEM_USER_BUTTON_FROM_VIEW_H_
-#define ASH_SYSTEM_USER_BUTTON_FROM_VIEW_H_
+#ifndef ASH_COMMON_SYSTEM_USER_BUTTON_FROM_VIEW_H_
+#define ASH_COMMON_SYSTEM_USER_BUTTON_FROM_VIEW_H_
 
 #include "base/macros.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/views/controls/button/custom_button.h"
 
 namespace ash {
 namespace tray {
 
 // This view is used to wrap it's content and transform it into button.
 class ButtonFromView : public views::CustomButton {
@@ skipping 43 matching lines @@
 
   // The insets which get used for the drawn accessibility (tab) frame.
   gfx::Insets tab_frame_inset_;
 
   DISALLOW_COPY_AND_ASSIGN(ButtonFromView);
 };
 
 }  // namespace tray
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_USER_BUTTON_FROM_VIEW_H_
+#endif  // ASH_COMMON_SYSTEM_USER_BUTTON_FROM_VIEW_H_