[giowt] (3) Be more explicit about aborting steps when throwing an exception.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=21654
Affected topics: Canvas, DOM APIs, HTML, Video Text Tracks, Workers

git-svn-id: http://svn.whatwg.org/webapps@7804 340c8d12-0b0e-0410-8428-c7bf67bfef74
[giow] (2) Make dir=auto inherit when the element has no obvious directionality. (Except for <bdi>, which still defaults to ltr.)
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=17835
Affected topics: DOM APIs, HTML

git-svn-id: http://svn.whatwg.org/webapps@7805 340c8d12-0b0e-0410-8428-c7bf67bfef74