Remove <iframe seamless> support.
Seamless iframes were behind a runtime flag that we never enabled, and the only other engine that implemented them (Blink) recently removed them. Since the feature is very invasive, let's take it out for now.
Created attachment 223180 [details]
Attachment 223180 [details] did not pass style-queue:
ERROR: ChangeLog:1: ChangeLog entry has no bug number [changelog/bugnumber] 
Total errors found: 1 in 29 files
If any of these errors are false positives, please file a bug against check-webkit-style.
Created attachment 223181 [details]
Created attachment 223182 [details]
Created attachment 223189 [details]
Comment on attachment 223189 [details]
Attachment 223189 [details] did not pass mac-wk2-ews (mac-wk2):
New failing tests:
Created attachment 223197 [details]
Archive of layout-test-results from webkit-ews-14 for mac-mountainlion-wk2
The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews.
Bot: webkit-ews-14 Port: mac-mountainlion-wk2 Platform: Mac OS X 10.8.5
Created attachment 223204 [details]
Comment on attachment 223204 [details]
Clearing flags on attachment: 223204
Committed r163427: <http://trac.webkit.org/changeset/163427>
All reviewed patches have been landed. Closing bug.