Make MediaFileUtil run on thread pool.

webkit/fileapi/local_file_system_test_helper.cc

 // Copyright (c) 2012 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 "webkit/fileapi/local_file_system_test_helper.h"
 
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "googleurl/src/gurl.h"
@@ skipping 52 matching lines @@
     const FilePath& base_dir,
     bool unlimited_quota,
     quota::QuotaManagerProxy* quota_manager_proxy,
     FileSystemFileUtil* file_util) {
   scoped_refptr<quota::MockSpecialStoragePolicy> special_storage_policy =
       new quota::MockSpecialStoragePolicy;
   special_storage_policy->SetAllUnlimited(unlimited_quota);
   file_system_context_ = new FileSystemContext(
       base::MessageLoopProxy::current(),
       base::MessageLoopProxy::current(),
+      base::MessageLoopProxy::current(),
       special_storage_policy,
       quota_manager_proxy,
       base_dir,
       CreateAllowFileAccessOptions());
 
   if (type_ == kFileSystemTypeTest) {
     file_system_context_->RegisterMountPointProvider(
         type_,
         new TestMountPointProvider(file_system_context_->file_task_runner(),
                                    base_dir));
@@ skipping 101 matching lines @@
 
 FileSystemOperationContext*
 LocalFileSystemTestOriginHelper::NewOperationContext() {
   DCHECK(file_system_context_.get());
   FileSystemOperationContext* context =
     new FileSystemOperationContext(file_system_context_.get());
   return context;
 }
 
 }  // namespace fileapi