frameset-flattening-simple test description says that the iframe should be 800x wide and should not have any scrollbars, however it is a bit difficult to know the size when checking the PNG reference and moreover the scrollbars of the main frame is visible, which is a bit confusing.
Created attachment 334615 [details] Patch
Comment on attachment 334615 [details] Patch Attachment 334615 [details] did not pass mac-ews (mac): Output: http://webkit-queues.webkit.org/results/6675944 New failing tests: fast/frames/flattening/frameset-flattening-simple.html
Created attachment 334618 [details] Archive of layout-test-results from ews101 for mac-sierra The attached test failures were seen while running run-webkit-tests on the mac-ews. Bot: ews101 Port: mac-sierra Platform: Mac OS X 10.12.6
Created attachment 334621 [details] Patch
Comment on attachment 334621 [details] Patch Attachment 334621 [details] did not pass win-ews (win): Output: http://webkit-queues.webkit.org/results/6677510 New failing tests: fast/frames/flattening/frameset-flattening-simple.html
Created attachment 334628 [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
Created attachment 334630 [details] Patch
Created attachment 334689 [details] Patch for landing
@Don: I plan to land this later but FYI the patch fails to apply on WinCairo due to changes in the PNG expectation. I think this already happened in the past for another bug.
(In reply to Frédéric Wang (:fredw) from comment #9) > @Don: I plan to land this later but FYI the patch fails to apply on WinCairo > due to changes in the PNG expectation. I think this already happened in the > past for another bug. Yea I have a few outstanding bugs on our EWS to take care of and will also update git.
Committed r229576: <https://trac.webkit.org/changeset/229576>
<rdar://problem/38415260>