This test also adds a mode which controls if the uniform data changes
frame-to-frame. Could be useful when we test removing redundant
data checking.
BUG=angleproject:1385
BUG=angleproject:1390
BUG=angleproject:1671
Change-Id: I936702b83f3d7cd97918542b06ecc1372884b412
Reviewed-on: https://chromium-review.googlesource.com/422348Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
