Handles the failures of output state change.

ash/display/output_configurator_animation.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_DISPLAY_OUTPUT_CONFIGURATOR_ANIMATION_H_
 #define ASH_DISPLAY_OUTPUT_CONFIGURATOR_ANIMATION_H_
 
 #include <map>
 
 #include "ash/ash_export.h"
@@ skipping 25 matching lines @@
   // call |callback| once all of the animations have finished.
   void StartFadeOutAnimation(base::Closure callback);
 
   // Starts the animation to clear the fade-out animation effect
   // for the all root windows.
   void StartFadeInAnimation();
 
  protected:
   // chromeos::OutputConfigurator::Observer overrides:
   virtual void OnDisplayModeChanged() OVERRIDE;
+  virtual void OnDisplayModeChangeFailed() OVERRIDE;
 
  private:
   // Clears all hiding layers.  Note that in case that this method is called
   // during an animation, the method call will cancel all of the animations
   // and *not* call the registered callback.
   void ClearHidingLayers();
 
   std::map<aura::RootWindow*, ui::Layer*> hiding_layers_;
   scoped_ptr<base::OneShotTimer<OutputConfiguratorAnimation> > timer_;
 
   DISALLOW_COPY_AND_ASSIGN(OutputConfiguratorAnimation);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_OUTPUT_CONFIGURATION_CONTROLLER_H_