Issue repaints for RenderLayers that get new composited backings after
all compositing layers and their geometry are updated.

BUG=370664

Review URL: https://codereview.chromium.org/311813005

git-svn-id: svn://svn.chromium.org/blink/trunk@175625 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Cleanup v8 usage in bindings

Followup to:
Cleanup v8 usage in modules
https://codereview.chromium.org/319653002/

Review URL: https://codereview.chromium.org/314063002

git-svn-id: svn://svn.chromium.org/blink/trunk@175626 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add a use counter for CSS Font Loading

BUG=380990

Review URL: https://codereview.chromium.org/315163002

git-svn-id: svn://svn.chromium.org/blink/trunk@175627 bbb929c8-8fbe-4397-9dbb-9b2b20218538