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

ash/common/system/tray/tray_utils.h

Index: ash/common/system/tray/tray_utils.h
diff --git a/ash/system/tray/tray_utils.h b/ash/common/system/tray/tray_utils.h
similarity index 86%
rename from ash/system/tray/tray_utils.h
rename to ash/common/system/tray/tray_utils.h
index 9794c4f5ba3a8cbe11f2eb298a7842f3bfa3985c..8c0c1363269ad01e9a3d5d1f700c805248bc6ea6 100644
--- a/ash/system/tray/tray_utils.h
+++ b/ash/common/system/tray/tray_utils.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_SYSTEM_TRAY_TRAY_UTILS_H_
-#define ASH_SYSTEM_TRAY_TRAY_UTILS_H_
+#ifndef ASH_COMMON_SYSTEM_TRAY_TRAY_UTILS_H_
+#define ASH_COMMON_SYSTEM_TRAY_TRAY_UTILS_H_
 
 #include <vector>
 
@@ -32,4 +32,4 @@ void SetTrayLabelItemBorder(TrayItemView* tray_view, ShelfAlignment alignment);
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_TRAY_TRAY_UTILS_H_
+#endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_UTILS_H_