Large canvas does not honor containing div's border radius

Source/core/rendering/RenderLayerCompositor.cpp

 /*
  * Copyright (C) 2009, 2010 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 2296 matching lines @@
     graphicsLayer->resetTrackedRepaints();
 
     for (size_t i = 0; i < graphicsLayer->children().size(); ++i)
         resetTrackedRepaintRectsRecursive(graphicsLayer->children()[i]);
 
     if (GraphicsLayer* replicaLayer = graphicsLayer->replicaLayer())
         resetTrackedRepaintRectsRecursive(replicaLayer);
 
     if (GraphicsLayer* maskLayer = graphicsLayer->maskLayer())
         resetTrackedRepaintRectsRecursive(maskLayer);
+
+    if (GraphicsLayer* clippingMaskLayer = graphicsLayer->contentsClippingMaskLayer())
+        resetTrackedRepaintRectsRecursive(clippingMaskLayer);
 }
 
 void RenderLayerCompositor::resetTrackedRepaintRects()
 {
     if (GraphicsLayer* rootLayer = rootGraphicsLayer())
         resetTrackedRepaintRectsRecursive(rootLayer);
 }
 
 void RenderLayerCompositor::setTracksRepaints(bool tracksRepaints)
 {
@@ skipping 507 matching lines @@
     } else if (graphicsLayer == m_scrollLayer.get()) {
         name = "Frame Scrolling Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace WebCore