Implement Paint Containment

third_party/WebKit/Source/core/layout/compositing/PaintLayerCompositor.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 759 matching lines @@
 {
     const bool hasCompositorAnimation = m_compositingReasonFinder.requiresCompositingForAnimation(*layer->layoutObject()->style());
     return m_hasAcceleratedCompositing && (hasCompositorAnimation || !layer->subtreeIsInvisible()) && layer->isSelfPaintingLayer() && !layer->layoutObject()->isLayoutFlowThread();
 }
 
 // Return true if the given layer is a stacking context and has compositing child
 // layers that it needs to clip. In this case we insert a clipping GraphicsLayer
 // into the hierarchy between this layer and its children in the z-order hierarchy.
 bool PaintLayerCompositor::clipsCompositingDescendants(const PaintLayer* layer) const
 {
-    return layer->hasCompositingDescendant() && layer->layoutObject()->hasClipOrOverflowClip();
+    return layer->hasCompositingDescendant() && layer->layoutObject()->hasClipRelatedProperty();
 }
 
 // If an element has composited negative z-index children, those children paint in front of the
 // layer background, so we need an extra 'contents' layer for the foreground of the layer
 // object.
 bool PaintLayerCompositor::needsContentsCompositingLayer(const PaintLayer* layer) const
 {
     if (!layer->hasCompositingDescendant())
         return false;
     return layer->stackingNode()->hasNegativeZOrderList();
@@ skipping 418 matching lines @@
     } else if (graphicsLayer == m_scrollLayer.get()) {
         name = "Frame Scrolling Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink