Standardize usage of virtual/override/final specifiers.

ash/default_user_wallpaper_delegate.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_DEFAULT_USER_WALLPAPER_DELEGATE_H_
 #define ASH_DEFAULT_USER_WALLPAPER_DELEGATE_H_
 
 #include "ash/ash_export.h"
 #include "ash/desktop_background/user_wallpaper_delegate.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 
 namespace ash {
 
 class ASH_EXPORT DefaultUserWallpaperDelegate : public UserWallpaperDelegate {
  public:
   DefaultUserWallpaperDelegate() {}
-  virtual ~DefaultUserWallpaperDelegate() {}
+  ~DefaultUserWallpaperDelegate() override {}
 
   // UserWallpaperDelegate overrides:
-  virtual int GetAnimationType() override;
-  virtual int GetAnimationDurationOverride() override;
-  virtual void SetAnimationDurationOverride(
-      int animation_duration_in_ms) override;
-  virtual bool ShouldShowInitialAnimation() override;
-  virtual void UpdateWallpaper(bool clear_cache) override;
-  virtual void InitializeWallpaper() override;
-  virtual void OpenSetWallpaperPage() override;
-  virtual bool CanOpenSetWallpaperPage() override;
-  virtual void OnWallpaperAnimationFinished() override;
-  virtual void OnWallpaperBootAnimationFinished() override;
+  int GetAnimationType() override;
+  int GetAnimationDurationOverride() override;
+  void SetAnimationDurationOverride(int animation_duration_in_ms) override;
+  bool ShouldShowInitialAnimation() override;
+  void UpdateWallpaper(bool clear_cache) override;
+  void InitializeWallpaper() override;
+  void OpenSetWallpaperPage() override;
+  bool CanOpenSetWallpaperPage() override;
+  void OnWallpaperAnimationFinished() override;
+  void OnWallpaperBootAnimationFinished() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DefaultUserWallpaperDelegate);
 };
 
 }  // namespace ash
 
 #endif  // ASH_DEFAULT_USER_WALLPAPER_DELEGATE_H_