mash: Migrate ash/system/user to ash/common.

ash/ash_view_ids.h

Index: ash/ash_view_ids.h
diff --git a/ash/ash_view_ids.h b/ash/ash_view_ids.h
deleted file mode 100644
index 61bf3cfc261f01628dc62f022df289f53af0e046..0000000000000000000000000000000000000000
--- a/ash/ash_view_ids.h
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef ASH_ASH_VIEW_IDS_H_
-#define ASH_ASH_VIEW_IDS_H_
-
-namespace ash {
-
-enum ViewID {
-  VIEW_ID_NONE = 10000,
-  VIEW_ID_MEDIA_TRAY_VIEW,
-  VIEW_ID_USER_VIEW_MEDIA_INDICATOR,
-};
-
-}  // namespace ash
-
-#endif  // ASH_ASH_VIEW_IDS_H_