This is part of https://codereview.chromium.org/1750123002/
Land this separately because this might have an unexpected perf impact
(see crbug.com/571885)
BUG=487841, 429053
TEST=gpu_unittests,webgl_conformance,webgl2_conformance
TBR=piman@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win_optional_gpu_tests_rel;tryserver.chromium.mac:mac_optional_gpu_tests_rel
Review URL: https://codereview.chromium.org/1785483002
Cr-Commit-Position: refs/heads/master@{#380260}