In many places we can get rid of this scoping operator.

BUG=angle:789

Change-Id: If6c40c435a97473d2fd9d6f1fb5a2c709393eb00
Reviewed-on: https://chromium-review.googlesource.com/225566Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>