Update {virtual,override} to follow C++11 style in cloud_print.

cloud_print/gcp20/prototype/privet_http_server.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 CLOUD_PRINT_GCP20_PROTOTYPE_PRIVET_HTTP_SERVER_H_
 #define CLOUD_PRINT_GCP20_PROTOTYPE_PRIVET_HTTP_SERVER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 123 matching lines @@
   virtual ~PrivetHttpServer();
 
   // Starts HTTP server: start listening port |port| for HTTP requests.
   bool Start(uint16 port);
 
   // Stops HTTP server.
   void Shutdown();
 
  private:
   // net::HttpServer::Delegate methods:
-  virtual void OnConnect(int connection_id) override {}
-  virtual void OnHttpRequest(
+  void OnConnect(int connection_id) override {}
+  void OnHttpRequest(
       int connection_id,
       const net::HttpServerRequestInfo& info) override;
-  virtual void OnWebSocketRequest(
+  void OnWebSocketRequest(
       int connection_id,
       const net::HttpServerRequestInfo& info) override;
-  virtual void OnWebSocketMessage(int connection_id,
-                                  const std::string& data) override;
-  virtual void OnClose(int connection_id) override;
+  void OnWebSocketMessage(int connection_id, const std::string& data) override;
+  void OnClose(int connection_id) override;
 
   // Sends error as response. Invoked when request method is invalid.
   void ReportInvalidMethod(int connection_id);
 
   // Returns |true| if |request| should be done with correct |method|.
   // Otherwise sends |Invalid method| error.
   // Also checks support of |request| by this server.
   bool ValidateRequestMethod(int connection_id,
                              const std::string& request,
                              const std::string& method);
@@ skipping 42 matching lines @@
 
   // Contains encapsulated object for listening for requests.
   scoped_ptr<net::HttpServer> server_;
 
   Delegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(PrivetHttpServer);
 };
 
 #endif  // CLOUD_PRINT_GCP20_PROTOTYPE_PRIVET_HTTP_SERVER_H_