Add UseCounters for display:run-in and display:compact.

This is to see if we can remove these features and simplify the code.
Our run-in implementation is buggy-tastic and, as best I can tell,
compact does nothing different than display:block.

Review URL: https://chromiumcodereview.appspot.com/21081004

git-svn-id: svn://svn.chromium.org/blink/trunk@155266 bbb929c8-8fbe-4397-9dbb-9b2b20218538