GitLab

Depends on https://codereview.chromium.org/907433002/.

BUG=455758
TESTED=Removed the webrtc-samples directory, applied
https://codereview.chromium.org/900403002, compiled and
then ran:
out/Release/browser_tests --run-manual --gtest_filter=WebRtcApprtcBrowserTest.MANUAL_WorksOnApprtc
on Linux.

Review URL: https://codereview.chromium.org/902133002

Cr-Commit-Position: refs/heads/master@{#315015}