FileAPI/sync file system cleanups for scoped_refptr operator T* cleanup.

chrome/browser/sync_file_system/local/canned_syncable_file_system.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/local/canned_syncable_file_system.h"
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/bind.h"
@@ skipping 191 matching lines @@
   runner->PostTaskAndReply(
       FROM_HERE, base::Bind(&base::DoNothing), run_loop.QuitClosure());
   run_loop.Run();
 }
 
 }  // namespace
 
 CannedSyncableFileSystem::CannedSyncableFileSystem(
     const GURL& origin,
     leveldb::Env* env_override,
-    base::SingleThreadTaskRunner* io_task_runner,
-    base::SingleThreadTaskRunner* file_task_runner)
+    const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
+    const scoped_refptr<base::SingleThreadTaskRunner>& file_task_runner)
     : origin_(origin),
       type_(storage::kFileSystemTypeSyncable),
       result_(base::File::FILE_OK),
       sync_status_(sync_file_system::SYNC_STATUS_OK),
       env_override_(env_override),
       io_task_runner_(io_task_runner),
       file_task_runner_(file_task_runner),
       is_filesystem_set_up_(false),
       is_filesystem_opened_(false),
       sync_status_observers_(new ObserverList) {
@@ skipping 533 matching lines @@
   sync_status_ = status;
   quit_closure.Run();
 }
 
 void CannedSyncableFileSystem::InitializeSyncStatusObserver() {
   ASSERT_TRUE(io_task_runner_->RunsTasksOnCurrentThread());
   backend()->sync_context()->sync_status()->AddObserver(this);
 }
 
 }  // namespace sync_file_system