SyncFS: Reorder initialization sequence of SyncFileSystemService

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 216 matching lines @@
                                     base::MessageLoopProxy::current().get(),
                                     storage_policy.get());
 
   std::vector<std::string> additional_allowed_schemes;
   additional_allowed_schemes.push_back(origin_.scheme());
   fileapi::FileSystemOptions options(
       fileapi::FileSystemOptions::PROFILE_MODE_NORMAL,
       additional_allowed_schemes);
 
   ScopedVector<fileapi::FileSystemBackend> additional_backends;
-  additional_backends.push_back(new SyncFileSystemBackend());
+  additional_backends.push_back(SyncFileSystemBackend::CreateForTesting());
 
   file_system_context_ = new FileSystemContext(
       io_task_runner_.get(),
       file_task_runner_.get(),
       fileapi::ExternalMountPoints::CreateRefCounted().get(),
       storage_policy.get(),
       quota_manager_->proxy(),
       additional_backends.Pass(),
       data_dir_.path(), options);
 
@@ skipping 422 matching lines @@
   sync_status_ = status;
   base::MessageLoop::current()->Quit();
 }
 
 void CannedSyncableFileSystem::InitializeSyncStatusObserver() {
   ASSERT_TRUE(io_task_runner_->RunsTasksOnCurrentThread());
   backend()->sync_context()->sync_status()->AddObserver(this);
 }
 
 }  // namespace sync_file_system