BUG=688765
TBR=enne@chromium.org,grt@chromium.org,robertshield@chromium.org,kapishnikov@chromium.org,zmo@chromium.org,vmiura@chromium.org,dalecurtis@chromium.org,jschuh@chromium.org,hirono@chromium.org,dbeam@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.android:android_cronet_tester;master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:closure_compilation;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win10_chromium_x64_rel_ng;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2683103002
Cr-Commit-Position: refs/heads/master@{#451034}