This makes the code easier to follow.

BUG=angleproject:1244
TEST=angle_end2end_tests

Change-Id: I7787b04217a6771629e69f6f67586f62ce5cfccf
Reviewed-on: https://chromium-review.googlesource.com/327053Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>