Standardize usage of virtual/override/final in chrome/

chrome/service/cloud_print/cloud_print_wipeout.h

 // Copyright (c) 2012 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 CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_WIPEOUT_H_
 #define CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_WIPEOUT_H_
 
 #include <list>
 #include <string>
 
 #include "base/basictypes.h"
 #include "chrome/service/cloud_print/cloud_print_url_fetcher.h"
 #include "url/gurl.h"
 
 namespace cloud_print {
 
 // CloudPrintWipeout unregisters list of printers from the cloudprint service.
 class CloudPrintWipeout : public CloudPrintURLFetcherDelegate {
  public:
   class Client {
    public:
     virtual void OnUnregisterPrintersComplete() = 0;
    protected:
      virtual ~Client() {}
   };
 
   CloudPrintWipeout(Client* client, const GURL& cloud_print_server_url);
-  virtual ~CloudPrintWipeout();
+  ~CloudPrintWipeout() override;
 
   void UnregisterPrinters(const std::string& auth_token,
                           const std::list<std::string>& printer_ids);
 
   // CloudPrintURLFetcher::Delegate implementation.
-  virtual CloudPrintURLFetcher::ResponseAction HandleJSONData(
+  CloudPrintURLFetcher::ResponseAction HandleJSONData(
       const net::URLFetcher* source,
       const GURL& url,
       base::DictionaryValue* json_data,
       bool succeeded) override;
-  virtual void OnRequestGiveUp() override;
-  virtual CloudPrintURLFetcher::ResponseAction OnRequestAuthError() override;
-  virtual std::string GetAuthHeader() override;
+  void OnRequestGiveUp() override;
+  CloudPrintURLFetcher::ResponseAction OnRequestAuthError() override;
+  std::string GetAuthHeader() override;
 
  private:
   void UnregisterNextPrinter();
 
   // CloudPrintWipeout client.
   Client* client_;
   // Cloud Print server url.
   GURL cloud_print_server_url_;
   // The CloudPrintURLFetcher instance for the current request.
   scoped_refptr<CloudPrintURLFetcher> request_;
   // Auth token.
   std::string auth_token_;
   // List of printer to unregister
   std::list<std::string> printer_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(CloudPrintWipeout);
 };
 
 }  // namespace cloud_print
 
 #endif  // CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_WIPEOUT_H_