https://bugs.webkit.org/show_bug.cgi?id=106762

Patch by Dima Gorbik <dgorbik@apple.com> on 2013-01-15
Reviewed by Eric Carlson.

Source/WebCore:

Implemented matching cue WebVTT elements by a voice attribute by adding a WebVTT specific voice attribute.
For DOM trees title attribute is used instead as this is required by specs.

* html/track/TextTrackCue.cpp:
(WebCore::TextTrackCue::copyWebVTTNodeToDOMTree): set a title argument instead of a voice attribute for the DOM tree.
* html/track/TextTrackCue.h:
(WebCore::TextTrackCue::voiceAttributeName):
* html/track/WebVTTParser.cpp:
(WebCore::WebVTTParser::constructTreeFromToken):

LayoutTests:

* media/track/captions-webvtt/styling.vtt:
* media/track/track-css-matching-expected.txt:
* media/track/track-css-matching.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139803 268f45cc-cd09-0410-ab3c-d52691b4dbfc