C++11 override style change for athena

athena/content/app_activity_proxy.h

Index: athena/content/app_activity_proxy.h
diff --git a/athena/content/app_activity_proxy.h b/athena/content/app_activity_proxy.h
index 6df8123e7a5a35fb64065afe05621b464f0ebd40..a8193cc9c100718edd5082014e49436dd499d16f 100644
--- a/athena/content/app_activity_proxy.h
+++ b/athena/content/app_activity_proxy.h
@@ -30,28 +30,28 @@ class AppActivityProxy : public Activity,
                    AppActivityRegistry* creator);
 
  protected:
-  virtual ~AppActivityProxy();
+  ~AppActivityProxy() override;
 
  // Activity overrides:
-  virtual ActivityViewModel* GetActivityViewModel() override;
-  virtual void SetCurrentState(ActivityState state) override;
-  virtual ActivityState GetCurrentState() override;
-  virtual bool IsVisible() override;
-  virtual ActivityMediaState GetMediaState() override;
-  virtual aura::Window* GetWindow() override;
-  virtual content::WebContents* GetWebContents() override;
+  ActivityViewModel* GetActivityViewModel() override;
+  void SetCurrentState(ActivityState state) override;
+  ActivityState GetCurrentState() override;
+  bool IsVisible() override;
+  ActivityMediaState GetMediaState() override;
+  aura::Window* GetWindow() override;
+  content::WebContents* GetWebContents() override;
 
   // ActivityViewModel overrides:
-  virtual void Init() override;
-  virtual SkColor GetRepresentativeColor() const override;
-  virtual base::string16 GetTitle() const override;
-  virtual gfx::ImageSkia GetIcon() const override;
-  virtual bool UsesFrame() const override;
-  virtual views::View* GetContentsView() override;
-  virtual views::Widget* CreateWidget() override;
-  virtual gfx::ImageSkia GetOverviewModeImage() override;
-  virtual void PrepareContentsForOverview() override;
-  virtual void ResetContentsView() override;
+  void Init() override;
+  SkColor GetRepresentativeColor() const override;
+  base::string16 GetTitle() const override;
+  gfx::ImageSkia GetIcon() const override;
+  bool UsesFrame() const override;
+  views::View* GetContentsView() override;
+  views::Widget* CreateWidget() override;
+  gfx::ImageSkia GetOverviewModeImage() override;
+  void PrepareContentsForOverview() override;
+  void ResetContentsView() override;
 
  private:
   // The creator of this object which needs to be informed if the object gets