Standardize usage of virtual/override/final in content/browser/

content/browser/renderer_host/media/media_stream_ui_proxy.h

Index: content/browser/renderer_host/media/media_stream_ui_proxy.h
diff --git a/content/browser/renderer_host/media/media_stream_ui_proxy.h b/content/browser/renderer_host/media/media_stream_ui_proxy.h
index c61bbfad78fe8105c4021e27c96a5963a906b130..23fc592e62b234836593036b5178af0c1130b3cb 100644
--- a/content/browser/renderer_host/media/media_stream_ui_proxy.h
+++ b/content/browser/renderer_host/media/media_stream_ui_proxy.h
@@ -90,23 +90,22 @@ class CONTENT_EXPORT MediaStreamUIProxy {
 class CONTENT_EXPORT FakeMediaStreamUIProxy : public MediaStreamUIProxy {
  public:
   explicit FakeMediaStreamUIProxy();
-  virtual ~FakeMediaStreamUIProxy();
+  ~FakeMediaStreamUIProxy() override;
 
   void SetAvailableDevices(const MediaStreamDevices& devices);
   void SetMicAccess(bool access);
   void SetCameraAccess(bool access);
 
   // MediaStreamUIProxy overrides.
-  virtual void RequestAccess(
-      const MediaStreamRequest& request,
-      const ResponseCallback& response_callback) override;
-  virtual void CheckAccess(const GURL& security_origin,
-                           MediaStreamType type,
-                           int render_process_id,
-                           int render_frame_id,
-                           const base::Callback<void(bool)>& callback) override;
-  virtual void OnStarted(const base::Closure& stop_callback,
-                         const WindowIdCallback& window_id_callback) override;
+  void RequestAccess(const MediaStreamRequest& request,
+                     const ResponseCallback& response_callback) override;
+  void CheckAccess(const GURL& security_origin,
+                   MediaStreamType type,
+                   int render_process_id,
+                   int render_frame_id,
+                   const base::Callback<void(bool)>& callback) override;
+  void OnStarted(const base::Closure& stop_callback,
+                 const WindowIdCallback& window_id_callback) override;
 
  private:
   // This is used for RequestAccess().