Remove webkitIsFullScreen everywhere except in bindings

It's equivalent to webkitCurrentFullScreenElement != null.

BUG=383813

Review URL: https://codereview.chromium.org/476353002

git-svn-id: svn://svn.chromium.org/blink/trunk@180439 bbb929c8-8fbe-4397-9dbb-9b2b20218538
8 files changed
tree: b5ca24ecca59a85f8013802a937a4a52f451d86b
  1. third_party/