chromeos: Move files in //ash/common to //ash, part 1

ash/system/tray/tray_background_view.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_COMMON_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
-#define ASH_COMMON_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
+#ifndef ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
+#define ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "ash/common/shelf/shelf_background_animator_observer.h"
-#include "ash/common/system/tray/actionable_view.h"
 #include "ash/public/cpp/shelf_types.h"
+#include "ash/system/tray/actionable_view.h"
 #include "base/macros.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/views/bubble/tray_bubble_view.h"
 
 namespace ash {
 class TrayEventFilter;
 class TrayBackground;
 class WmShelf;
 
@@ skipping 163 matching lines @@
   bool separator_visible_;
 
   std::unique_ptr<TrayWidgetObserver> widget_observer_;
   std::unique_ptr<TrayEventFilter> tray_event_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayBackgroundView);
 };
 
 }  // namespace ash
 
-#endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
+#endif  // ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_