Move DisplayManager and DisplayChangeObserverX11 from aura to ash.

ash/test/multi_display_manager_test_api.h

-// Copyright (c) 2012 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_TEST_MULTI_DISPLAY_MANAGER_TEST_API_H_
-#define ASH_TEST_MULTI_DISPLAY_MANAGER_TEST_API_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-
-namespace ash {
-namespace internal {
-class MultiDisplayManager;
-}  // internal
-
-namespace test {
-
-class MultiDisplayManagerTestApi {
- public:
-  explicit MultiDisplayManagerTestApi(
-      internal::MultiDisplayManager* display_manager);
-  virtual ~MultiDisplayManagerTestApi();
-
-  // Update the display configuration as given in |display_specs|. The format of
-  // |display_spec| is a list of comma separated spec for each displays. Please
-  // refer to the comment in |aura::DisplayManager::CreateDisplayFromSpec| for
-  // the format of the display spec.
-  void UpdateDisplay(const std::string& display_specs);
-
- private:
-  internal::MultiDisplayManager* display_manager_;  // not owned
-
-  DISALLOW_COPY_AND_ASSIGN(MultiDisplayManagerTestApi);
-};
-
-}  // namespace test
-}  // namespace ash
-
-#endif  // ASH_TEST_MULTI_DISPLAY_MANAGER_TEST_API_H_