Standardize usage of virtual/override/final in net/

net/spdy/spdy_websocket_stream.h

Index: net/spdy/spdy_websocket_stream.h
diff --git a/net/spdy/spdy_websocket_stream.h b/net/spdy/spdy_websocket_stream.h
index 66a89e863940bb7ac74ce3c48b109d73a28f5058..854afbf931a08509fbb343d37fbf096f7eb0f4c0 100644
--- a/net/spdy/spdy_websocket_stream.h
+++ b/net/spdy/spdy_websocket_stream.h
@@ -60,7 +60,7 @@ class NET_EXPORT_PRIVATE SpdyWebSocketStream
 
   SpdyWebSocketStream(const base::WeakPtr<SpdySession>& spdy_session,
                       Delegate* delegate);
-  virtual ~SpdyWebSocketStream();
+  ~SpdyWebSocketStream() override;
 
   // Initializes SPDY stream for the WebSocket.
   // It might create SPDY stream asynchronously.  In this case, this method
@@ -75,12 +75,12 @@ class NET_EXPORT_PRIVATE SpdyWebSocketStream
   void Close();
 
   // SpdyStream::Delegate
-  virtual void OnRequestHeadersSent() override;
-  virtual SpdyResponseHeadersStatus OnResponseHeadersUpdated(
+  void OnRequestHeadersSent() override;
+  SpdyResponseHeadersStatus OnResponseHeadersUpdated(
       const SpdyHeaderBlock& response_headers) override;
-  virtual void OnDataReceived(scoped_ptr<SpdyBuffer> buffer) override;
-  virtual void OnDataSent() override;
-  virtual void OnClose(int status) override;
+  void OnDataReceived(scoped_ptr<SpdyBuffer> buffer) override;
+  void OnDataSent() override;
+  void OnClose(int status) override;
 
  private:
   friend class SpdyWebSocketStreamTest;