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

ash/system/overview/overview_button_tray.h

Index: ash/system/overview/overview_button_tray.h
diff --git a/ash/common/system/overview/overview_button_tray.h b/ash/system/overview/overview_button_tray.h
similarity index 90%
rename from ash/common/system/overview/overview_button_tray.h
rename to ash/system/overview/overview_button_tray.h
index c0f71dc30c5a1a2258a4cb0aa0e2522e4353bd01..f5db6be9dab364c5b63d52ca234cb0e6e3d34f5f 100644
--- a/ash/common/system/overview/overview_button_tray.h
+++ b/ash/system/overview/overview_button_tray.h
@@ -2,13 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_COMMON_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
-#define ASH_COMMON_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
+#ifndef ASH_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
+#define ASH_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/session/session_state_observer.h"
 #include "ash/common/shell_observer.h"
-#include "ash/common/system/tray/tray_background_view.h"
+#include "ash/system/tray/tray_background_view.h"
 #include "base/macros.h"
 
 namespace views {
@@ -70,4 +70,4 @@ class ASH_EXPORT OverviewButtonTray : public TrayBackgroundView,
 
 }  // namespace ash
 
-#endif  // ASH_COMMON_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
+#endif  // ASH_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_