Remove WebThemeEngine

sky/viewer/platform/webthemeengine_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_WEBTHEMEENGINE_IMPL_H_
-#define SKY_VIEWER_PLATFORM_WEBTHEMEENGINE_IMPL_H_
-
-#include "sky/engine/public/platform/WebThemeEngine.h"
-
-namespace sky {
-
-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 sky
-
-#endif  // SKY_VIEWER_PLATFORM_WEBTHEMEENGINE_IMPL_H_