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This ensures that the passthrough command decoder is tested on developer
builds.

BUG=738568
BUG=602688

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: I3cb473c51d8c889f958827233ca67d6cf6b7fb04
Reviewed-on: https://chromium-review.googlesource.com/1075507Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562533}