Standardize usage of virtual/override/final in net/

net/websockets/websocket_handshake_stream_base.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_WEBSOCKETS_WEBSOCKET_HANDSHAKE_STREAM_BASE_H_
 #define NET_WEBSOCKETS_WEBSOCKET_HANDSHAKE_STREAM_BASE_H_
 
 // This file is included from net/http files.
 // Since net/http can be built without linking net/websockets code,
 // this file must not introduce any link-time dependencies on websockets.
@@ skipping 22 matching lines @@
   // An object that stores data needed for the creation of a
   // WebSocketBasicHandshakeStream object. A new CreateHelper is used for each
   // WebSocket connection.
   class NET_EXPORT_PRIVATE CreateHelper : public base::SupportsUserData::Data {
    public:
     // Returns a key to use to lookup this object in a URLRequest object. It is
     // different from any other key that is supplied to
     // URLRequest::SetUserData().
     static const void* DataKey() { return kWebSocketHandshakeUserDataKey; }
 
-    virtual ~CreateHelper() {}
+    ~CreateHelper() override {}
 
     // Create a WebSocketBasicHandshakeStream. This is called after the
     // underlying connection has been established but before any handshake data
     // has been transferred. This can be called more than once in the case that
     // HTTP authentication is needed.
     virtual WebSocketHandshakeStreamBase* CreateBasicStream(
         scoped_ptr<ClientSocketHandle> connection,
         bool using_proxy) = 0;
 
     // Create a WebSocketSpdyHandshakeStream (unimplemented as of October 2013)
     virtual WebSocketHandshakeStreamBase* CreateSpdyStream(
         const base::WeakPtr<SpdySession>& session,
         bool use_relative_url) = 0;
   };
 
   // This has to have an inline implementation so that the net/url_request/
   // tests do not fail on iOS.
-  virtual ~WebSocketHandshakeStreamBase() {}
+  ~WebSocketHandshakeStreamBase() override {}
 
   // After the handshake has completed, this method creates a WebSocketStream
   // (of the appropriate type) from the WebSocketHandshakeStreamBase object.
   // The WebSocketHandshakeStreamBase object is unusable after Upgrade() has
   // been called.
   virtual scoped_ptr<WebSocketStream> Upgrade() = 0;
 
  protected:
   // As with the destructor, this must be inline.
   WebSocketHandshakeStreamBase() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebSocketHandshakeStreamBase);
 };
 
 }  // namespace net
 
 #endif  // NET_WEBSOCKETS_WEBSOCKET_HANDSHAKE_STREAM_BASE_H_