Make MountPointProvider pluggable from outside webkit/fileapi

webkit/fileapi/mock_file_system_context.h

+// Copyright (c) 2013 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.
+
+#ifndef WEBKIT_FILEAPI_MOCK_FILE_SYSTEM_CONTEXT_H_
+#define WEBKIT_FILEAPI_MOCK_FILE_SYSTEM_CONTEXT_H_
+
+#include "base/files/file_path.h"
+
+namespace quota {
+class QuotaManagerProxy;
+class SpecialStoragePolicy;
+}
+
+namespace fileapi {
+
+class FileSystemContext;
+
+FileSystemContext* CreateFileSystemContextForTesting(
+    quota::QuotaManagerProxy* quota_manager_proxy,
+    const base::FilePath& base_path);
+
+}  // namespace fileapi
+
+#endif  // WEBKIT_FILEAPI_MOCK_FILE_SYSTEM_CONTEXT_H_