Make the MediaQueryList listener an EventListener

The spec changed from a callback to using DOM events, update
our code accordingly. See the note at
http://dev.w3.org/csswg/cssom-view/#dom-mediaquerylist-removelistener
for how this is compatible with existing content.

BUG=375658

Review URL: https://codereview.chromium.org/396283004

git-svn-id: svn://svn.chromium.org/blink/trunk@181124 bbb929c8-8fbe-4397-9dbb-9b2b20218538