[giow] (3) Fix a accidental (?) change in r7614 that undefined <img width> and <img height>; not sure what I was doing there.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24327
Affected topics: DOM APIs, HTML, Rendering

git-svn-id: http://svn.whatwg.org/webapps@8410 340c8d12-0b0e-0410-8428-c7bf67bfef74
(cherry picked from commit 44a37ff8eff5f375caac26b182d2cd85df25922c)
[giow] (3) Allow browsers to entirely ignored arguments to captureEvents() and releaseEvents(), rather than requiring at least one
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24324
Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@8411 340c8d12-0b0e-0410-8428-c7bf67bfef74
(cherry picked from commit e70cd700253a4a14ac691775c751bfede7fbcf4e)
[giow] (2) Some ARIA role additions for authoring flexibility
Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@8412 340c8d12-0b0e-0410-8428-c7bf67bfef74
(cherry picked from commit ec7878465c8532ba4cb3a0beeec1d3f8a562d560)