[webkit-reviews] review requested: [Bug 21261] Add layoutTestController API so that animation layout tests don't have to delay : [Attachment 25138] Patch v4

[bugzilla-daemon at webkit.org]

Pierre-Olivier Latour <pol at apple.com> has asked  for review:
Bug 21261: Add layoutTestController API so that animation layout tests don't
have to delay
https://bugs.webkit.org/show_bug.cgi?id=21261

Attachment 25138: Patch v4
https://bugs.webkit.org/attachment.cgi?id=25138&action=review