Update {virtual,override,final} to follow C++11 style in ash.

ash/touch/touch_transformer_controller.h

 // 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_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_
 #define ASH_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "ash/display/display_controller.h"
 #include "ui/gfx/transform.h"
 
 namespace ui {
 struct TouchscreenDevice;
 }  // namespace ui
 
 namespace ash {
 
 // TouchTransformerController listens to display configuration change
 // and updates the touch transformation for touch displays.
 class ASH_EXPORT TouchTransformerController
     : public DisplayController::Observer {
  public:
   TouchTransformerController();
-  virtual ~TouchTransformerController();
+  ~TouchTransformerController() override;
 
   // Updates the TouchTransformer for touch device and pushes the new
   // TouchTransformer into device manager.
   void UpdateTouchTransformer() const;
 
   // DisplayController::Observer:
-  virtual void OnDisplaysInitialized() override;
-  virtual void OnDisplayConfigurationChanged() override;
+  void OnDisplaysInitialized() override;
+  void OnDisplayConfigurationChanged() override;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
                            TouchTransformerMirrorModeLetterboxing);
   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
                            TouchTransformerMirrorModePillarboxing);
   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
                            TouchTransformerExtendedMode);
   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
                            TouchRadiusScale);
@@ skipping 18 matching lines @@
   double GetTouchResolutionScale(
       const DisplayInfo& touch_display,
       const ui::TouchscreenDevice& touch_device) const;
 
   DISALLOW_COPY_AND_ASSIGN(TouchTransformerController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_