Update touch-action hit-testing to match latest spec changes. touch-action now
applies to all elements with both width AND height properties.

Also fix application to SVG elements.

BUG=356215, 247396

Review URL: https://codereview.chromium.org/220343002

git-svn-id: svn://svn.chromium.org/blink/trunk@171207 bbb929c8-8fbe-4397-9dbb-9b2b20218538