Layout test fast/canvas/setWidthResetAfterForcedRender.html is failing on the Mesa bots after r93988.
Created attachment 105515 [details] Patch
Comment on attachment 105515 [details] Patch Never mind; this fix didn't work. :(
This test is still really flaky
FYI: even if it were "fixed" back to pre-93988 behaviour, I don't think the pixel results will be correct, since LayoutTestController::display() doesn't really handle the repaint mask correctly for composited layers. When the compositor is enabled, WebViewHost::displayRepaintMask() probably needs to paint into the composited layer rather than the framebuffer. See https://bugs.webkit.org/show_bug.cgi?id=54561 for reference.
*** This bug has been marked as a duplicate of bug 67955 ***