services/ui: Revert CLs that broke Windows.

services/ui/public/cpp/raster_thread_helper.h

-// Copyright 2015 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 SERVICES_UI_PUBLIC_CPP_RASTER_THREAD_HELPER_H_
-#define SERVICES_UI_PUBLIC_CPP_RASTER_THREAD_HELPER_H_
-
-#include <memory>
-
-#include "base/macros.h"
-
-namespace cc {
-class TaskGraphRunner;
-class SingleThreadTaskGraphRunner;
-}
-
-namespace ui {
-
-class RasterThreadHelper {
- public:
-  RasterThreadHelper();
-  ~RasterThreadHelper();
-
-  cc::TaskGraphRunner* task_graph_runner();
-
- private:
-  std::unique_ptr<cc::SingleThreadTaskGraphRunner> task_graph_runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(RasterThreadHelper);
-};
-
-}  // namespace ui
-
-#endif  // SERVICES_UI_PUBLIC_CPP_RASTER_THREAD_HELPER_H_