Standardize usage of virtual/override/final in components/

components/gcm_driver/gcm_channel_status_request.h

 // Copyright 2014 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 COMPONENTS_GCM_DRIVER_GCM_CHANNEL_STATUS_REQUEST_H_
 #define COMPONENTS_GCM_DRIVER_GCM_CHANNEL_STATUS_REQUEST_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
@@ skipping 24 matching lines @@
   typedef base::Callback<void(bool update_received,
                               bool enabled,
                               int poll_interval_seconds)>
       GCMChannelStatusRequestCallback;
 
   GCMChannelStatusRequest(
       const scoped_refptr<net::URLRequestContextGetter>& request_context_getter,
       const std::string& channel_status_request_url,
       const std::string& user_agent,
       const GCMChannelStatusRequestCallback& callback);
-  virtual ~GCMChannelStatusRequest();
+  ~GCMChannelStatusRequest() override;
 
   void Start();
 
   static int default_poll_interval_seconds();
   static int min_poll_interval_seconds();
 
  private:
   FRIEND_TEST_ALL_PREFIXES(GCMChannelStatusRequestTest, RequestData);
 
   // Overridden from URLFetcherDelegate:
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) override;
+  void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   bool ParseResponse(const net::URLFetcher* source);
   void RetryWithBackoff(bool update_backoff);
 
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
   const std::string channel_status_request_url_;
   const std::string user_agent_;
   GCMChannelStatusRequestCallback callback_;
   scoped_ptr<net::URLFetcher> url_fetcher_;
   net::BackoffEntry backoff_entry_;
   base::WeakPtrFactory<GCMChannelStatusRequest> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMChannelStatusRequest);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_CHANNEL_STATUS_REQUEST_H_