Calling FinishAllRendering when setIsAcceleratedCompositingActive(false) is called is not necessary when we don't switch between accelerated and software compositing. FinishAllRendering make a synchronous glFinish call that blocks the renderer for tens of milliseconds and should be avoided when possible.
Created attachment 166604 [details]
Comment on attachment 166604 [details]
Clearing flags on attachment: 166604
Committed r130178: <http://trac.webkit.org/changeset/130178>
All reviewed patches have been landed. Closing bug.