When pinch zooming & setting scroll position, the UI thread calls DefaultTapHighlight::hide continuously to make sure it isn't visible. Calling hide when it is already hidden should do nothing. However calling it from the UI thread now keeps creating & adding fade animations, since the visible flag check is in the webkit thread branch only. This results in the tap highlight being visible during zoom after the first fade out.
Created attachment 149072 [details] Patch
Comment on attachment 149072 [details] Patch Clearing flags on attachment: 149072 Committed r121049: <http://trac.webkit.org/changeset/121049>
All reviewed patches have been landed. Closing bug.