Create base class for common functionality of Web{Local,Remote}Frame

third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 998 matching lines @@
         updateLayerTreeDeviceScaleFactor();
         updateLayerTreeBackgroundColor();
         m_layerTreeView->setHasTransparentBackground(isTransparent());
         updateLayerTreeViewport();
         m_isAcceleratedCompositingActive = true;
     }
 }
 
 PaintLayerCompositor* WebFrameWidgetImpl::compositor() const
 {
-    LocalFrame* frame = toLocalFrame(toCoreFrame(m_localRoot));
+    LocalFrame* frame = m_localRoot->frame();
     if (!frame || !frame->document() || !frame->document()->layoutView())
         return nullptr;
 
     return frame->document()->layoutView()->compositor();
 }
 
 void WebFrameWidgetImpl::setRootGraphicsLayer(GraphicsLayer* layer)
 {
     m_rootGraphicsLayer = layer;
     m_rootLayer = layer ? layer->platformLayer() : nullptr;
@@ skipping 39 matching lines @@
 
 HitTestResult WebFrameWidgetImpl::hitTestResultForRootFramePos(const IntPoint& posInRootFrame)
 {
     IntPoint docPoint(m_localRoot->frame()->view()->rootFrameToContents(posInRootFrame));
     HitTestResult result = m_localRoot->frame()->eventHandler().hitTestResultAtPoint(docPoint, HitTestRequest::ReadOnly | HitTestRequest::Active);
     result.setToShadowHostIfInUserAgentShadowRoot();
     return result;
 }
 
 } // namespace blink