Some of the media captions menu tests can be tidied. For example: - video-controls-captions-trackmenu should use the shared test helper JS library - the tests should dynamically add the video src so that we always catch the 'canplaythrough' event (it sometimes misses)
<rdar://problem/12915971>
Created attachment 180282 [details] Patch
Committed r138283: <http://trac.webkit.org/changeset/138283>