Use UtilityProcessHost to patch files.

chrome/browser/component_updater/test/component_patcher_mock.h

-// Copyright 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 CHROME_BROWSER_COMPONENT_UPDATER_TEST_COMPONENT_PATCHER_MOCK_H_
-#define CHROME_BROWSER_COMPONENT_UPDATER_TEST_COMPONENT_PATCHER_MOCK_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "chrome/browser/component_updater/component_patcher.h"
-
-namespace base {
-class FilePath;
-}
-
-namespace component_updater {
-
-class MockComponentPatcher : public ComponentPatcher {
- public:
-  MockComponentPatcher() {}
-  virtual ComponentUnpacker::Error Patch(PatchType patch_type,
-                                         const base::FilePath& input_file,
-                                         const base::FilePath& patch_file,
-                                         const base::FilePath& output_file,
-                                         int* error) OVERRIDE;
- private:
-  DISALLOW_COPY_AND_ASSIGN(MockComponentPatcher);
-};
-
-}  // namespace component_updater
-
-#endif  // CHROME_BROWSER_COMPONENT_UPDATER_TEST_COMPONENT_PATCHER_MOCK_H_