The following layout test is flaky on Mac WebKit1: plugins/access-after-page-destroyed.html When it fails, it's a timeout due to an exception thrown in "p.enabledPlugin;" - p is null. Sounds like there is some race getting navigator.mimeTypes in a newly created window.
Created attachment 212744 [details] clean up the test
Comment on attachment 212744 [details] clean up the test Landed in r156495. This is unlikely to fix flakiness, but let's see if anything changes. I cannot reproduce this locally.
When it fails, it says: +FAIL navigator.mimeTypes is null +FAIL TypeError: null is not an object (evaluating 'p.enabledPlugin')
Not happening any more.