Move native_viewport and gles2 service impls to //services

mojo/services/native_viewport/platform_viewport_headless.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.
-
-#include "base/macros.h"
-#include "mojo/services/native_viewport/platform_viewport.h"
-#include "ui/gfx/rect.h"
-
-namespace mojo {
-
-class PlatformViewportHeadless : public PlatformViewport {
- public:
-  ~PlatformViewportHeadless() override;
-
-  static scoped_ptr<PlatformViewport> Create(Delegate* delegate);
-
- private:
-  explicit PlatformViewportHeadless(Delegate* delegate);
-
-  // Overridden from PlatformViewport:
-  void Init(const gfx::Rect& bounds) override;
-  void Show() override;
-  void Hide() override;
-  void Close() override;
-  gfx::Size GetSize() override;
-  void SetBounds(const gfx::Rect& bounds) override;
-  void SetCapture() override;
-  void ReleaseCapture() override;
-
-  Delegate* delegate_;
-  gfx::Rect bounds_;
-
-  DISALLOW_COPY_AND_ASSIGN(PlatformViewportHeadless);
-};
-
-}  // namespace mojo