chromeos: Move files in //ash/common to //ash, part 2

ash/shelf/wm_shelf_observer.h

Index: ash/shelf/wm_shelf_observer.h
diff --git a/ash/common/shelf/wm_shelf_observer.h b/ash/shelf/wm_shelf_observer.h
similarity index 84%
rename from ash/common/shelf/wm_shelf_observer.h
rename to ash/shelf/wm_shelf_observer.h
index d137692452cb848f9c368c5599e1159dc408adb2..55033bef25a21cdda96429ccebc8cf4f54fda5a5 100644
--- a/ash/common/shelf/wm_shelf_observer.h
+++ b/ash/shelf/wm_shelf_observer.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_COMMON_SHELF_WM_SHELF_OBSERVER_H_
-#define ASH_COMMON_SHELF_WM_SHELF_OBSERVER_H_
+#ifndef ASH_SHELF_WM_SHELF_OBSERVER_H_
+#define ASH_SHELF_WM_SHELF_OBSERVER_H_
 
 #include "ash/ash_export.h"
 #include "ash/public/cpp/shelf_types.h"
@@ -27,4 +27,4 @@ class ASH_EXPORT WmShelfObserver {
 
 }  // namespace ash
 
-#endif  // ASH_COMMON_SHELF_WM_SHELF_OBSERVER_H_
+#endif  // ASH_SHELF_WM_SHELF_OBSERVER_H_