Use new API to download blobs from Google Drive.

chrome/browser/sync_file_system/drive_backend/sync_engine.cc

 // 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.
 
 #include "chrome/browser/sync_file_system/drive_backend/sync_engine.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 57 matching lines @@
 
 std::unique_ptr<drive::DriveServiceInterface>
 SyncEngine::DriveServiceFactory::CreateDriveService(
     OAuth2TokenService* oauth2_token_service,
     net::URLRequestContextGetter* url_request_context_getter,
     base::SequencedTaskRunner* blocking_task_runner) {
   return std::unique_ptr<
       drive::DriveServiceInterface>(new drive::DriveAPIService(
       oauth2_token_service, url_request_context_getter, blocking_task_runner,
       GURL(google_apis::DriveApiUrlGenerator::kBaseUrlForProduction),
-      GURL(google_apis::DriveApiUrlGenerator::kBaseDownloadUrlForProduction),
       GURL(google_apis::DriveApiUrlGenerator::kBaseThumbnailUrlForProduction),
       std::string() /* custom_user_agent */));
 }
 
 class SyncEngine::WorkerObserver : public SyncWorkerInterface::Observer {
  public:
   WorkerObserver(base::SequencedTaskRunner* ui_task_runner,
                  base::WeakPtr<SyncEngine> sync_engine)
       : ui_task_runner_(ui_task_runner),
         sync_engine_(sync_engine) {
@@ skipping 688 matching lines @@
 
 SyncStatusCallback SyncEngine::TrackCallback(
     const SyncStatusCallback& callback) {
   return callback_tracker_.Register(
       base::Bind(callback, SYNC_STATUS_ABORT),
       callback);
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system