Hi Team, This is more for merge of following Blink commit: https://src.chromium.org/viewvc/blink?view=revision&revision=166525 I am separating it to not over-complicate following bug 254761: https://github.com/WebKit/WebKit/pull/17624 Just wanted to raise so we can fix it. Thanks!
seeAlso https://bugs.webkit.org/buglist.cgi?bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&list_id=9536592&query_format=advanced&short_desc=stepUp%20&short_desc_type=allwordssubstr
<rdar://problem/115595585>
It has pre-requisite - https://src.chromium.org/viewvc/blink?view=revision&revision=163656 __ I am merging few commits (three in total) with PR - https://github.com/WebKit/WebKit/pull/22889 and then I can merge 'pre-requisite' and this. Later, I have to add 'NaN' handling to match others and then also do 'applyStep' alignment by merging few more Blink patches and then we might be OK and synced with Blink. :-)
Ended up doing ToT version in PR - https://github.com/WebKit/WebKit/pull/22889 So this bug is not needed.