GitLab

Intent to Implement and Ship:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/GLl6aWs9-EM/uTqxEmM4iGcJ

The API is only enabled for testing, to allow the recent spec changes
to be implemented with tests for the new API: http://crbug.com/402376

This does not add support for the :fullscreen pseudo-class, which is
tracked by a dedicate issue: http://crbug.com/402378

BUG=383813

Review URL: https://codereview.chromium.org/395633011

git-svn-id: svn://svn.chromium.org/blink/trunk@180052 bbb929c8-8fbe-4397-9dbb-9b2b20218538