mash: Partially migrate ash/desktop_background to ash common types.

ash/desktop_background/desktop_background_controller_test_api.h

Index: ash/desktop_background/desktop_background_controller_test_api.h
diff --git a/ash/desktop_background/desktop_background_controller_test_api.h b/ash/desktop_background/desktop_background_controller_test_api.h
deleted file mode 100644
index 1fc28dfd3eef4cc17420587d46ed4ec315cc8526..0000000000000000000000000000000000000000
--- a/ash/desktop_background/desktop_background_controller_test_api.h
+++ /dev/null
@@ -1,24 +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_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_CONTROLLER_TEST_API_H_
-#define ASH_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_CONTROLLER_TEST_API_H_
-
-#include "ash/desktop_background/desktop_background_controller.h"
-
-namespace ash {
-
-class DesktopBackgroundController::TestAPI {
- public:
-  explicit TestAPI(DesktopBackgroundController* controller);
-
-  void set_wallpaper_reload_delay_for_test(bool value);
-
- private:
-  DesktopBackgroundController* controller_;
-};
-
-}  // namespace ash
-
-#endif  // ASH_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_CONTROLLER_TEST_API_H_