BUG=angleproject:1987
TEST=angle_end2end_tests

Change-Id: I3b0afb441a41dbd7f204b1d1bba7884c8d203ce1
Reviewed-on: https://chromium-review.googlesource.com/749004
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>