Also needed is [1] in webrtc, which fixes some build warnings. Could
land in parallel.

[1] https://webrtc-review.googlesource.com/c/src/+/156980

BUG=1012850

Change-Id: Ia24e490db5e71cf1add0e10f4c1264aefb69143c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1859935
Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705589}