Make MediaFileUtil run on thread pool.

webkit/tools/test_shell/simple_file_system.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/tools/test_shell/simple_file_system.h"
 
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
@@ skipping 58 matching lines @@
   g_blob_storage_controller->FinishBuildingBlob(blob_url, mime_type);
 }
 
 }  // namespace
 
 SimpleFileSystem::SimpleFileSystem() {
   if (file_system_dir_.CreateUniqueTempDir()) {
     file_system_context_ = new FileSystemContext(
         base::MessageLoopProxy::current(),
         base::MessageLoopProxy::current(),
+        base::MessageLoopProxy::current(),
         NULL /* special storage policy */,
         NULL /* quota manager */,
         file_system_dir_.path(),
         fileapi::CreateAllowFileAccessOptions());
   } else {
     LOG(WARNING) << "Failed to create a temp dir for the filesystem."
                     "FileSystem feature will be disabled.";
   }
 }
 
@@ skipping 282 matching lines @@
     const FilePath& platform_path,
     const scoped_refptr<webkit_blob::ShareableFileReference>& file_ref) {
   DCHECK(g_io_thread);
   if (result == base::PLATFORM_FILE_OK) {
     g_io_thread->PostTask(
         FROM_HERE,
         base::Bind(&RegisterBlob, blob_url, platform_path));
   }
   DidGetMetadata(callbacks, result, info, platform_path);
 }