A number of related changes-
Bug 8340 is that we previously had WebKitTransitionEnd renamed to TransitionEnd, but had to remove that when Chrome added a new TransitionEnd.
Changes-
- Made WebKitTransitionEnd implement TransitionEnd and made it private.
- Added a test for the TransitionEnd event.
- Fixed the TransitionEnd event not working on non-Chrome browsers.
- Added support check for CSS transitions.
- Added annotations for CSS transition support.
BUG=8340
Review URL: https://codereview.chromium.org//12211099
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@18276 260f80e4-7a28-3924-810f-c04153c831b5