ash: Get output info from chromeos instead of XRandR.

ash/display/display_error_observer.h

-// Copyright 2013 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_DISPLAY_DISPLAY_ERROR_OBSERVER_H_
-#define ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_H_
-
-#include "ash/ash_export.h"
-#include "base/compiler_specific.h"
-#include "base/strings/string16.h"
-#include "chromeos/display/output_configurator.h"
-
-namespace ash {
-namespace internal {
-
-// The class to observe the output failures and shows the error dialog when
-// necessary.
-class ASH_EXPORT DisplayErrorObserver
-    : public chromeos::OutputConfigurator::Observer {
- public:
-  DisplayErrorObserver();
-  virtual ~DisplayErrorObserver();
-
-  // chromeos::OutputConfigurator::Observer overrides:
-  virtual void OnDisplayModeChangeFailed(
-      chromeos::OutputState failed_new_state) OVERRIDE;
-
- private:
-  friend class DisplayErrorObserverTest;
-
-  base::string16 GetTitleOfDisplayErrorNotificationForTest();
-
-  DISALLOW_COPY_AND_ASSIGN(DisplayErrorObserver);
-};
-
-}  // namespace internal
-}  // namespace ash
-
-#endif  // ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_H_