Standardize usage of virtual/override/final in content/

content/child/socket_stream_dispatcher.h

Index: content/child/socket_stream_dispatcher.h
diff --git a/content/child/socket_stream_dispatcher.h b/content/child/socket_stream_dispatcher.h
index 0289e33324b2b35c905de115f624dae40cd59fc9..25877f8cda0f81a3e5963e7e204f5e41a8217b1a 100644
--- a/content/child/socket_stream_dispatcher.h
+++ b/content/child/socket_stream_dispatcher.h
@@ -27,14 +27,14 @@ class WebSocketStreamHandleDelegate;
 class SocketStreamDispatcher : public IPC::Listener {
  public:
   SocketStreamDispatcher();
-  virtual ~SocketStreamDispatcher() {}
+  ~SocketStreamDispatcher() override {}
 
   static WebSocketStreamHandleBridge* CreateBridge(
       blink::WebSocketStreamHandle* handle,
       WebSocketStreamHandleDelegate* delegate);
 
   // IPC::Listener implementation.
-  virtual bool OnMessageReceived(const IPC::Message& msg) override;
+  bool OnMessageReceived(const IPC::Message& msg) override;
 
  private:
   void OnConnected(int socket_id, int max_amount_send_allowed);