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Suppress WebGL2 OpenGL failures due to which testing was paused.
Also re-enable angle_perftests claimed to be fixed by this driver.

TBR=bsheedy

Bug: 1016459, 1026468, 1002313, 1023745
Change-Id: Iaafa8a2ee290bbc56df201f9ac51dea2f8612c71
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1932884Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#718458}