Hold URLRequestContextGetter by scoped_refptr in Drive related code.

chrome/browser/google_apis/request_sender.cc

 // 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.
 
 #include "chrome/browser/google_apis/request_sender.h"
 
 #include "base/bind.h"
 #include "base/stl_util.h"
 #include "chrome/browser/google_apis/auth_service.h"
 #include "chrome/browser/google_apis/base_requests.h"
+#include "net/url_request/url_request_context_getter.h"
 
 namespace google_apis {
 
 RequestSender::RequestSender(
     AuthServiceInterface* auth_service,
     net::URLRequestContextGetter* url_request_context_getter,
     base::TaskRunner* blocking_task_runner,
     const std::string& custom_user_agent)
     : auth_service_(auth_service),
       url_request_context_getter_(url_request_context_getter),
@@ skipping 74 matching lines @@
     return;
   request->Cancel();
 }
 
 void RequestSender::RequestFinished(AuthenticatedRequestInterface* request) {
   in_flight_requests_.erase(request);
   delete request;
 }
 
 }  // namespace google_apis