Suppress sequence checks in SyncFileSystem on the shutdown phase

chrome/browser/extensions/api/sync_file_system/sync_file_system_browsertest.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 "base/json/json_reader.h"
 #include "base/run_loop.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/values.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/drive/fake_drive_service.h"
@@ skipping 83 matching lines @@
     scoped_ptr<drive_backend::SyncEngine::DriveServiceFactory>
         drive_service_factory(new FakeDriveServiceFactory(this));
 
     fake_signin_manager_.reset(new FakeSigninManagerForTesting(
         browser()->profile()));
 
     remote_service_ = new drive_backend::SyncEngine(
         base::ThreadTaskRunnerHandle::Get(),  // ui_task_runner
         MakeSequencedTaskRunner(),
         MakeSequencedTaskRunner(),
+        content::BrowserThread::GetBlockingPool(),
         base_dir_.path(),
         NULL,  // task_logger
         NULL,  // notification_manager
         extension_service,
         fake_signin_manager_.get(),  // signin_manager
         NULL,  // token_service
         NULL,  // request_context
         drive_service_factory.Pass(),
         in_memory_env_.get());
     remote_service_->SetSyncEnabled(true);
@@ skipping 91 matching lines @@
 
   sync_engine()->GoogleSigninSucceeded("test_account", "tester", "testing");
   WaitUntilIdle();
 
   bar_created.Reply("resume");
 
   EXPECT_TRUE(catcher.GetNextResult());
 }
 
 }  // namespace sync_file_system