Use the default theme as the fallback UI in Blink

webkit/glue/webfallbackthemeengine_impl.h

+// Copyright (c) 2011 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 WEBKIT_GLUE_WEBFALLBACKTHEMEENGINE_IMPL_H_
+#define WEBKIT_GLUE_WEBFALLBACKTHEMEENGINE_IMPL_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebFallbackThemeEngine.h"
+
+namespace ui {
+class FallbackTheme;
+}
+
+namespace webkit_glue {
+
+class WebFallbackThemeEngineImpl : public WebKit::WebFallbackThemeEngine {
+ public:
+  WebFallbackThemeEngineImpl();
+  virtual ~WebFallbackThemeEngineImpl();
+
+  // WebFallbackThemeEngine methods:
+  virtual WebKit::WebSize getSize(WebKit::WebFallbackThemeEngine::Part);
+  virtual void paint(
+      WebKit::WebCanvas* canvas,
+      WebKit::WebFallbackThemeEngine::Part part,
+      WebKit::WebFallbackThemeEngine::State state,
+      const WebKit::WebRect& rect,
+      const WebKit::WebFallbackThemeEngine::ExtraParams* extra_params);
+
+ private:
+  scoped_ptr<ui::FallbackTheme> theme_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebFallbackThemeEngineImpl);
+};
+
+}  // namespace webkit_glue
+
+#endif  // WEBKIT_GLUE_WEBFALLBACKTHEMEENGINE_IMPL_H_