Because they are not introspectable
Created attachment 340080 [details] Patch
Comment on attachment 340080 [details] Patch Attachment 340080 [details] did not pass win-ews (win): Output: http://webkit-queues.webkit.org/results/7639658 New failing tests: http/tests/security/canvas-remote-read-remote-video-localhost.html
Created attachment 340100 [details] Archive of layout-test-results from ews200 for win-future The attached test failures were seen while running run-webkit-tests on the win-ews. Bot: ews200 Port: win-future Platform: CYGWIN_NT-6.1-2.9.0-0.318-5-3-x86_64-64bit
Committed r231693: <https://trac.webkit.org/changeset/231693>
<rdar://problem/40155511>