Caused timeouts on the Skia bots when rolling ANGLE.

BUG=angleproject:2686
BUG=angleproject:2464

Change-Id: I311b075522b86410d055e0b742342423eaa7eeb5
Reviewed-on: https://chromium-review.googlesource.com/1115216Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>