We do this for the main content layer already.
<rdar://problem/40713608>
Created attachment 341738 [details] patch
Comment on attachment 341738 [details] patch Attachment 341738 [details] did not pass win-ews (win): Output: http://webkit-queues.webkit.org/results/7924099 New failing tests: http/tests/security/contentSecurityPolicy/userAgentShadowDOM/allow-audio.html
Created attachment 341755 [details] Archive of layout-test-results from ews201 for win-future The attached test failures were seen while running run-webkit-tests on the win-ews. Bot: ews201 Port: win-future Platform: CYGWIN_NT-6.1-2.9.0-0.318-5-3-x86_64-64bit
Comment on attachment 341738 [details] patch Clearing flags on attachment: 341738 Committed r232539: <https://trac.webkit.org/changeset/232539>
All reviewed patches have been landed. Closing bug.