Delete //sky/services/platform

sky/services/platform/platform_impl.h

-// Copyright 2014 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 SKY_VIEWER_PLATFORM_PLATFORM_IMPL_H_
-#define SKY_VIEWER_PLATFORM_PLATFORM_IMPL_H_
-
-#include "base/message_loop/message_loop.h"
-#include "sky/engine/public/platform/Platform.h"
-
-namespace mojo {
-class ApplicationImpl;
-}
-
-namespace sky {
-
-class PlatformImpl : public blink::Platform {
- public:
-  explicit PlatformImpl();
-  ~PlatformImpl() override;
-
-  // blink::Platform methods:
-  blink::WebString defaultLocale() override;
-  base::SingleThreadTaskRunner* mainThreadTaskRunner() override;
-
- private:
-  scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(PlatformImpl);
-};
-
-}  // namespace sky
-
-#endif  // SKY_VIEWER_PLATFORM_PLATFORM_IMPL_H_