C++11 override style change for athena

athena/extensions/chrome/athena_chrome_app_delegate.h

Index: athena/extensions/chrome/athena_chrome_app_delegate.h
diff --git a/athena/extensions/chrome/athena_chrome_app_delegate.h b/athena/extensions/chrome/athena_chrome_app_delegate.h
index 78965da662f351c03e17b890990400f26697364c..ad2afc68d9f4bdfdd1357a851de2cbf0296cfb6c 100644
--- a/athena/extensions/chrome/athena_chrome_app_delegate.h
+++ b/athena/extensions/chrome/athena_chrome_app_delegate.h
@@ -12,28 +12,28 @@ namespace athena {
 class AthenaChromeAppDelegate : public AthenaAppDelegateBase {
  public:
   AthenaChromeAppDelegate();
-  virtual ~AthenaChromeAppDelegate();
+  ~AthenaChromeAppDelegate() override;
 
  private:
   // extensions::AppDelegate:
-  virtual void InitWebContents(content::WebContents* web_contents) override;
-  virtual content::ColorChooser* ShowColorChooser(
+  void InitWebContents(content::WebContents* web_contents) override;
+  content::ColorChooser* ShowColorChooser(
       content::WebContents* web_contents,
       SkColor initial_color) override;
-  virtual void RunFileChooser(
+  void RunFileChooser(
       content::WebContents* tab,
       const content::FileChooserParams& params) override;
-  virtual void RequestMediaAccessPermission(
+  void RequestMediaAccessPermission(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback,
       const extensions::Extension* extension) override;
-  virtual bool CheckMediaAccessPermission(
+  bool CheckMediaAccessPermission(
       content::WebContents* web_contents,
       const GURL& security_origin,
       content::MediaStreamType type,
       const extensions::Extension* extension) override;
-  virtual void SetWebContentsBlocked(content::WebContents* web_contents,
+  void SetWebContentsBlocked(content::WebContents* web_contents,
                                      bool blocked) override;
 
   DISALLOW_COPY_AND_ASSIGN(AthenaChromeAppDelegate);