Fix crash when _topConstraint is null.
Created attachment 343666 [details] Patch
Comment on attachment 343666 [details] Patch Attachment 343666 [details] did not pass win-ews (win): Output: https://webkit-queues.webkit.org/results/8356209 New failing tests: http/tests/security/video-poster-cross-origin-crash2.html
Created attachment 343693 [details] Archive of layout-test-results from ews202 for win-future The attached test failures were seen while running run-webkit-tests on the win-ews. Bot: ews202 Port: win-future Platform: CYGWIN_NT-6.1-2.9.0-0.318-5-3-x86_64-64bit
Comment on attachment 343666 [details] Patch Clearing flags on attachment: 343666 Committed r233314: <https://trac.webkit.org/changeset/233314>
All reviewed patches have been landed. Closing bug.
<rdar://problem/41592304>