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

ash/system/tray/tray_background_view.h

Index: ash/system/tray/tray_background_view.h
diff --git a/ash/common/system/tray/tray_background_view.h b/ash/system/tray/tray_background_view.h
similarity index 96%
rename from ash/common/system/tray/tray_background_view.h
rename to ash/system/tray/tray_background_view.h
index 49e71055e55adee2fc1244a00d2b6f4ef0d96dff..a35f82803896e9d5a9c90f6d7a8456896128bb88 100644
--- a/ash/common/system/tray/tray_background_view.h
+++ b/ash/system/tray/tray_background_view.h
@@ -2,15 +2,15 @@
 // 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"
@@ -194,4 +194,4 @@ class ASH_EXPORT TrayBackgroundView : public ActionableView,
 
 }  // namespace ash
 
-#endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
+#endif  // ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_