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There were basically two issues: - localName and namespaceUri moved from Node down to Element. - The transitionEnd event was polyfilled based on the deprecated webkitTransitionEnd event, so it was switched to the standard transtionEnd. The Attr change was needed because the node map was using localName on Attr (inherited from Node), when it should have been using name. Attr is not actually exposed anywhere, so made it private. BUG= R=efortuna@google.com Review URL: https://codereview.chromium.org//15814008 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23423 260f80e4-7a28-3924-810f-c04153c831b5