Also move a lot of supporting code.

BUG=angle:789

Change-Id: I098bf7d072ece1f414605783c32ec5354ba63e19
Reviewed-on: https://chromium-review.googlesource.com/226061Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>