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

google_apis/drive/drive_api_requests.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 GOOGLE_APIS_DRIVE_DRIVE_API_REQUESTS_H_
 #define GOOGLE_APIS_DRIVE_DRIVE_API_REQUESTS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 95 matching lines @@
                               scoped_ptr<DataType> data)> Callback;
 
   // |callback| is called when the request finishes either by success or by
   // failure. On success, a JSON Value object is passed. It must not be null.
   DriveApiDataRequest(RequestSender* sender, const Callback& callback)
       : DriveApiPartialFieldRequest(sender),
         callback_(callback),
         weak_ptr_factory_(this) {
     DCHECK(!callback_.is_null());
   }
-  virtual ~DriveApiDataRequest() {}
+  ~DriveApiDataRequest() override {}
 
  protected:
   // UrlFetchRequestBase overrides.
-  virtual void ProcessURLFetchResults(const net::URLFetcher* source) override {
+  void ProcessURLFetchResults(const net::URLFetcher* source) override {
     DriveApiErrorCode error = GetErrorCode();
     switch (error) {
       case HTTP_SUCCESS:
       case HTTP_CREATED:
         base::PostTaskAndReplyWithResult(
             blocking_task_runner(),
             FROM_HERE,
             base::Bind(&DriveApiDataRequest::Parse, response_writer()->data()),
             base::Bind(&DriveApiDataRequest::OnDataParsed,
                        weak_ptr_factory_.GetWeakPtr(), error));
         break;
       default:
         RunCallbackOnPrematureFailure(error);
         OnProcessURLFetchResultsComplete();
         break;
     }
   }
 
-  virtual void RunCallbackOnPrematureFailure(DriveApiErrorCode error) override {
+  void RunCallbackOnPrematureFailure(DriveApiErrorCode error) override {
     callback_.Run(error, scoped_ptr<DataType>());
   }
 
  private:
   // Parses the |json| string by using DataType::CreateFrom.
   static scoped_ptr<DataType> Parse(const std::string& json) {
     scoped_ptr<base::Value> value = ParseJson(json);
     return value ? DataType::CreateFrom(*value) : scoped_ptr<DataType>();
   }
 
@@ skipping 1024 matching lines @@
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<BatchUploadRequest> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BatchUploadRequest);
 };
 
 }  // namespace drive
 }  // namespace google_apis
 
 #endif  // GOOGLE_APIS_DRIVE_DRIVE_API_REQUESTS_H_