ash: Get output info from chromeos instead of XRandR.

ash/display/display_error_observer_chromeos.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_
+#ifndef ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_CHROMEOS_H_
+#define ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_CHROMEOS_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
@@ skipping 12 matching lines @@
   friend class DisplayErrorObserverTest;
 
   base::string16 GetTitleOfDisplayErrorNotificationForTest();
 
   DISALLOW_COPY_AND_ASSIGN(DisplayErrorObserver);
 };
 
 }  // namespace internal
 }  // namespace ash
 
-#endif  // ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_H_
+#endif  // ASH_DISPLAY_DISPLAY_ERROR_OBSERVER_CHROMEOS_H_