WebGL test: textures/misc/tex-new-formats

BUG=angleproject:1407
BUG=chromium:616176

Change-Id: I7b557587c1ea0861bcac327a370480b36f679794
Reviewed-on: https://chromium-review.googlesource.com/351170Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>