ash: Rename tray_views.{h,cc} to tray_utils.{h,cc}

ash/system/tray/tray_utils.h

Index: ash/system/tray/tray_utils.h
diff --git a/ash/system/tray/tray_views.h b/ash/system/tray/tray_utils.h
similarity index 88%
rename from ash/system/tray/tray_views.h
rename to ash/system/tray/tray_utils.h
index 9d177afb0cb44eccc9a2ffe4c5ea13ebd8701c87..412fb97d8da40d7f3a17e57cc8cfb9f16ed2a29f 100644
--- a/ash/system/tray/tray_views.h
+++ b/ash/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_VIEWS_H_
-#define ASH_SYSTEM_TRAY_TRAY_VIEWS_H_
+#ifndef ASH_SYSTEM_TRAY_TRAY_UTILS_H_
+#define ASH_SYSTEM_TRAY_TRAY_UTILS_H_
 
 #include "ash/shelf/shelf_types.h"
 
@@ -32,4 +32,4 @@ void SetTrayLabelItemBorder(TrayItemView* tray_view,
 }  // namespace internal
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_TRAY_TRAY_VIEWS_H_
+#endif  // ASH_SYSTEM_TRAY_TRAY_UTILS_H_