Make MediaFileUtil run on thread pool.

webkit/fileapi/file_system_mount_point_provider_unittest.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 <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/file_util.h"
@@ skipping 194 matching lines @@
   void SetUp() {
     ASSERT_TRUE(data_dir_.CreateUniqueTempDir());
     special_storage_policy_ = new quota::MockSpecialStoragePolicy;
   }
 
  protected:
   void SetupNewContext(const FileSystemOptions& options) {
     file_system_context_ = new FileSystemContext(
         base::MessageLoopProxy::current(),
         base::MessageLoopProxy::current(),
+        base::MessageLoopProxy::current(),
         special_storage_policy_,
         NULL,
         data_dir_.path(),
         options);
 #if defined(OS_CHROMEOS)
     ExternalFileSystemMountPointProvider* external_provider =
         file_system_context_->external_provider();
     external_provider->AddLocalMountPoint(FilePath(kMountPoint));
 #endif
   }
@@ skipping 180 matching lines @@
   FilePath virtual_unused;
   EXPECT_TRUE(external_provider->GetVirtualPath(FilePath(kMountPoint),
                                                 &virtual_unused));
   external_provider->RemoveMountPoint(FilePath(kMountPoint));
   EXPECT_FALSE(external_provider->GetVirtualPath(FilePath(kMountPoint),
                                                  &virtual_unused));
 }
 #endif
 
 }  // namespace fileapi