Standardize usage of virtual/override/final specifiers.

ash/rotator/screen_rotation.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_SCREEN_ROTATION_H_
 #define ASH_SCREEN_ROTATION_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 13 matching lines @@
 
 // A screen rotation represents a single transition from one screen orientation
 // to another. The  intended usage is that a new instance of the class is
 // created for every transition. It is possible to update the target orientation
 // in the middle of a transition.
 class ASH_EXPORT ScreenRotation : public ui::LayerAnimationElement {
  public:
   // |degrees| are clockwise. |layer| is the target of the animation. Does not
   // take ownership of |layer|.
   ScreenRotation(int degrees, ui::Layer* layer);
-  virtual ~ScreenRotation();
+  ~ScreenRotation() override;
 
  private:
   // Generates the intermediate transformation matrices used during the
   // animation.
   void InitTransform(ui::Layer* layer);
 
   // Implementation of ui::LayerAnimationDelegate
-  virtual void OnStart(ui::LayerAnimationDelegate* delegate) override;
-  virtual bool OnProgress(double t,
-                          ui::LayerAnimationDelegate* delegate) override;
-  virtual void OnGetTarget(TargetValue* target) const override;
-  virtual void OnAbort(ui::LayerAnimationDelegate* delegate) override;
+  void OnStart(ui::LayerAnimationDelegate* delegate) override;
+  bool OnProgress(double t, ui::LayerAnimationDelegate* delegate) override;
+  void OnGetTarget(TargetValue* target) const override;
+  void OnAbort(ui::LayerAnimationDelegate* delegate) override;
 
   scoped_ptr<ui::InterpolatedTransform> interpolated_transform_;
 
   // The number of degrees to rotate.
   int degrees_;
 
   // The target origin.
   gfx::Point new_origin_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenRotation);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SCREEN_ROTATION_H_