[NOCOMMIT] Make DriveService{Wrapper|Messenger} class

chrome/browser/sync_file_system/drive_backend/sync_engine_context.cc

 // 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.
 
 #include "chrome/browser/sync_file_system/drive_backend/sync_engine_context.h"
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/sequenced_task_runner.h"
 #include "chrome/browser/drive/drive_service_interface.h"
 #include "chrome/browser/drive/drive_uploader.h"
 #include "chrome/browser/sync_file_system/drive_backend/metadata_database.h"
 #include "chrome/browser/sync_file_system/remote_change_processor.h"
 
 namespace sync_file_system {
 namespace drive_backend {
 
 SyncEngineContext::SyncEngineContext(
-    drive::DriveServiceInterface* drive_service,
+    scoped_ptr<drive::DriveServiceInterface> drive_service,
     drive::DriveUploaderInterface* drive_uploader,
     base::SequencedTaskRunner* ui_task_runner,
     base::SequencedTaskRunner* file_task_runner)
-    : drive_service_(drive_service),
+    : drive_service_(drive_service.Pass()),
       drive_uploader_(drive_uploader),
       remote_change_processor_(NULL),
       ui_task_runner_(ui_task_runner),
       file_task_runner_(file_task_runner) {}
 
 SyncEngineContext::~SyncEngineContext() {}
 
 drive::DriveServiceInterface* SyncEngineContext::GetDriveService() {
-  return drive_service_;
+  return drive_service_.get();
 }
 
 drive::DriveUploaderInterface* SyncEngineContext::GetDriveUploader() {
   return drive_uploader_;
 }
 
 MetadataDatabase* SyncEngineContext::GetMetadataDatabase() {
   return metadata_database_.get();
 }
 
@@ skipping 19 matching lines @@
     metadata_database_ = metadata_database.Pass();
 }
 
 void SyncEngineContext::SetRemoteChangeProcessor(
     RemoteChangeProcessor* remote_change_processor) {
   remote_change_processor_ = remote_change_processor;
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system