Move html_viewer from mojo/services to components.

mojo/services/html_viewer/web_theme_engine_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 MOJO_SERVICES_HTML_VIEWER_WEB_THEME_ENGINE_IMPL_H_
-#define MOJO_SERVICES_HTML_VIEWER_WEB_THEME_ENGINE_IMPL_H_
-
-#include "third_party/WebKit/public/platform/WebThemeEngine.h"
-
-namespace html_viewer {
-
-class WebThemeEngineImpl : public blink::WebThemeEngine {
- public:
-  // WebThemeEngine methods:
-  virtual blink::WebSize getSize(blink::WebThemeEngine::Part);
-  virtual void paint(blink::WebCanvas* canvas,
-                     blink::WebThemeEngine::Part part,
-                     blink::WebThemeEngine::State state,
-                     const blink::WebRect& rect,
-                     const blink::WebThemeEngine::ExtraParams* extra_params);
-  virtual void paintStateTransition(blink::WebCanvas* canvas,
-                                    blink::WebThemeEngine::Part part,
-                                    blink::WebThemeEngine::State startState,
-                                    blink::WebThemeEngine::State endState,
-                                    double progress,
-                                    const blink::WebRect& rect);
-};
-
-}  // namespace html_viewer
-
-#endif  // MOJO_SERVICES_HTML_VIEWER_WEB_THEME_ENGINE_IMPL_H_