Marshall Greenblatt pointed out on chromium-dev that if test_shell is run with --enable-accelerated-compositing --enable-webgl, pages containing WebGL content do not render correctly. This is a likely regression (or failure to verify this functionality) from https://bugs.webkit.org/show_bug.cgi?id=46849 . This may also be causing layout test failures with DumpRenderTree in new-run-webkit-tests' --platform chromium-gpu configuration.
Created attachment 72090 [details] Patch
Committed r70717: <http://trac.webkit.org/changeset/70717>