1. BlitGL's resources were not being intialized.
  2. The format/type information was not enough to know if the destination
     texture was SRGB.

BUG=693090

Change-Id: I3fc277a175772d3b6acace1810cb43f4a9bdc473
Reviewed-on: https://chromium-review.googlesource.com/982642Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>