NEW 120142
When compositing layers are removed, we can repaint the wrong layer 3 times 
https://bugs.webkit.org/show_bug.cgi?id=120142
Summary When compositing layers are removed, we can repaint the wrong layer 3 times
Simon Fraser (smfr)
Reported 2013-08-21 16:36:59 PDT
RenderLayerCompositor::layerWillBeRemoved() gets called 3 times when a single RenderLayer is being removed, and those 3 repaints can go into wrong layer, because teh compositing ancestor is not the layer that the renderer will go into now it no longer has a layer (it may go into a previous sibling).
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