Make MediaFileUtil run on thread pool.

webkit/fileapi/file_system_mount_point_provider_unittest.cc

Index: webkit/fileapi/file_system_mount_point_provider_unittest.cc
diff --git a/webkit/fileapi/file_system_mount_point_provider_unittest.cc b/webkit/fileapi/file_system_mount_point_provider_unittest.cc
index b5b07a26fc346c41060e76f12336526bc46ae827..f9cfb3b3a15391a576254c1f6336fbfad5c7103f 100644
--- a/webkit/fileapi/file_system_mount_point_provider_unittest.cc
+++ b/webkit/fileapi/file_system_mount_point_provider_unittest.cc
@@ -19,6 +19,7 @@
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/fileapi/file_system_context.h"
+#include "webkit/fileapi/file_system_task_runners.h"
 #include "webkit/fileapi/file_system_util.h"
 #include "webkit/fileapi/mock_file_system_options.h"
 #include "webkit/fileapi/sandbox_mount_point_provider.h"
@@ -210,8 +211,7 @@ class FileSystemMountPointProviderTest : public testing::Test {
  protected:
   void SetupNewContext(const FileSystemOptions& options) {
     file_system_context_ = new FileSystemContext(
-        base::MessageLoopProxy::current(),
-        base::MessageLoopProxy::current(),
+        FileSystemTaskRunners::CreateMockTaskRunners(),
         special_storage_policy_,
         NULL,
         data_dir_.path(),