chromeos: Move files in //ash/common to //ash

ash/system/screen_layout_observer.h

Index: ash/system/screen_layout_observer.h
diff --git a/ash/system/chromeos/screen_layout_observer.h b/ash/system/screen_layout_observer.h
similarity index 93%
rename from ash/system/chromeos/screen_layout_observer.h
rename to ash/system/screen_layout_observer.h
index 1ef8bbb74fa3b1df0e34310216f992dfff4399b7..d103bc62fad87151aa52141ff06dd2092ea59a88 100644
--- a/ash/system/chromeos/screen_layout_observer.h
+++ b/ash/system/screen_layout_observer.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_SYSTEM_CHROMEOS_SCREEN_LAYOUT_OBSERVER_H_
-#define ASH_SYSTEM_CHROMEOS_SCREEN_LAYOUT_OBSERVER_H_
+#ifndef ASH_SYSTEM_SCREEN_LAYOUT_OBSERVER_H_
+#define ASH_SYSTEM_SCREEN_LAYOUT_OBSERVER_H_
 
 #include <stdint.h>
 
 #include <map>
 
 #include "ash/ash_export.h"
-#include "ash/common/wm_display_observer.h"
+#include "ash/wm_display_observer.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "ui/display/manager/managed_display_info.h"
@@ -84,4 +84,4 @@ class ASH_EXPORT ScreenLayoutObserver : public WmDisplayObserver {
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_CHROMEOS_SCREEN_LAYOUT_OBSERVER_H_
+#endif  // ASH_SYSTEM_SCREEN_LAYOUT_OBSERVER_H_