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We only need it if hardware overlays can be used.

BUG=800950
TEST=bots
R=sunnyps@chromium.org

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: Id1a00799ee77f942183b55327ba21c7af65165b5
Reviewed-on: https://chromium-review.googlesource.com/1232153
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Sunny Sachanandani <sunnyps@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592267}