RenderBox::localToAbsoluteQuad() shows up in some profiles for deeply nested content. It should be fixed to use LayoutState when possible.
Created attachment 26660 [details] Patch, changelog
Comment on attachment 26660 [details] Patch, changelog This looks sane to me. I can't promise I'm an expert in this code though. You might yet want Hyatt or Mitz to look at this. But as I said above, it looks right by my eyes.
Got done as part of the patch in bug 24163.