[SyncFS] Remove usage of file task runner under drive_backend/

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 "base/single_thread_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"
 #include "chrome/browser/sync_file_system/task_logger.h"
 
 namespace sync_file_system {
 namespace drive_backend {
 
 SyncEngineContext::SyncEngineContext(
     scoped_ptr<drive::DriveServiceInterface> drive_service,
     scoped_ptr<drive::DriveUploaderInterface> drive_uploader,
     TaskLogger* task_logger,
     base::SingleThreadTaskRunner* ui_task_runner,
-    base::SequencedTaskRunner* worker_task_runner,
-    base::SequencedTaskRunner* file_task_runner)
+    base::SequencedTaskRunner* worker_task_runner)
     : drive_service_(drive_service.Pass()),
       drive_uploader_(drive_uploader.Pass()),
       task_logger_(task_logger
                    ? task_logger->AsWeakPtr()
                    : base::WeakPtr<TaskLogger>()),
       remote_change_processor_(NULL),
       ui_task_runner_(ui_task_runner),
-      worker_task_runner_(worker_task_runner),
-      file_task_runner_(file_task_runner) {
+      worker_task_runner_(worker_task_runner) {
   sequence_checker_.DetachFromSequence();
 }
 
 SyncEngineContext::~SyncEngineContext() {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
 }
 
 drive::DriveServiceInterface* SyncEngineContext::GetDriveService() {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
   return drive_service_.get();
@@ skipping 27 matching lines @@
 base::SingleThreadTaskRunner* SyncEngineContext::GetUITaskRunner() {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
   return ui_task_runner_.get();
 }
 
 base::SequencedTaskRunner* SyncEngineContext::GetWorkerTaskRunner() {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
   return worker_task_runner_.get();
 }
 
-base::SequencedTaskRunner* SyncEngineContext::GetFileTaskRunner() {
-  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
-  return file_task_runner_.get();
-}
-
 void SyncEngineContext::SetMetadataDatabase(
     scoped_ptr<MetadataDatabase> metadata_database) {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
   if (metadata_database)
     metadata_database_ = metadata_database.Pass();
 }
 
 void SyncEngineContext::SetRemoteChangeProcessor(
     RemoteChangeProcessor* remote_change_processor) {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
   DCHECK(remote_change_processor);
   remote_change_processor_ = remote_change_processor;
 }
 
 void SyncEngineContext::DetachFromSequence() {
   sequence_checker_.DetachFromSequence();
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system