Make MediaFileUtil run on thread pool.

webkit/fileapi/isolated_file_util_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 <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/file_util.h"
@@ skipping 49 matching lines @@
     ASSERT_TRUE(data_dir_.CreateUniqueTempDir());
     file_util_.reset(new DraggedFileUtil());
 
     // Register the files/directories of RegularTestCases (with random
     // root paths) as dropped files.
     SimulateDropFiles();
 
     file_system_context_ = new FileSystemContext(
         base::MessageLoopProxy::current(),
         base::MessageLoopProxy::current(),
+        base::MessageLoopProxy::current(),
         make_scoped_refptr(new quota::MockSpecialStoragePolicy()),
         NULL /* quota_manager */,
         data_dir_.path(),
         CreateAllowFileAccessOptions());
 
     // For cross-FileUtil copy/move tests.
     other_file_util_.reset(new LocalFileUtil());
     other_file_util_helper_.SetUp(file_system_context_, other_file_util_.get());
   }
 
@@ skipping 424 matching lines @@
     EXPECT_EQ(base::PLATFORM_FILE_OK,
               file_util()->Truncate(GetOperationContext().get(), url, 999));
     ASSERT_EQ(base::PLATFORM_FILE_OK,
               file_util()->GetFileInfo(GetOperationContext().get(), url,
                                        &info, &platform_path));
     EXPECT_EQ(999, info.size);
   }
 }
 
 }  // namespace fileapi