They no longer can be null.
Created attachment 236473 [details] patch
Comment on attachment 236473 [details] patch r=me (Is this 2013?)
Comment on attachment 236473 [details] patch Attachment 236473 [details] did not pass mac-ews (mac): Output: http://webkit-queues.appspot.com/results/6274247248838656 New failing tests: fast/events/tabindex-focus-blur-all.html
Created attachment 236480 [details] Archive of layout-test-results from webkit-ews-01 for mac-mountainlion The attached test failures were seen while running run-webkit-tests on the mac-ews. Bot: webkit-ews-01 Port: mac-mountainlion Platform: Mac OS X 10.8.5
Comment on attachment 236473 [details] patch Attachment 236473 [details] did not pass mac-wk2-ews (mac-wk2): Output: http://webkit-queues.appspot.com/results/5351488557678592 New failing tests: fast/events/tabindex-focus-blur-all.html
Created attachment 236485 [details] Archive of layout-test-results from webkit-ews-11 for mac-mountainlion-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: webkit-ews-11 Port: mac-mountainlion-wk2 Platform: Mac OS X 10.8.5
Comment on attachment 236473 [details] patch Attachment 236473 [details] did not pass mac-ews (mac): Output: http://webkit-queues.appspot.com/results/6112047607578624 New failing tests: fast/events/tabindex-focus-blur-all.html
Created attachment 236488 [details] Archive of layout-test-results from webkit-ews-02 for mac-mountainlion The attached test failures were seen while running run-webkit-tests on the mac-ews. Bot: webkit-ews-02 Port: mac-mountainlion Platform: Mac OS X 10.8.5
https://trac.webkit.org/r172599