GitLab

We removed the definition a while ago, but forgot to remove the
declaration in the header.

BUG=959231

Change-Id: I6e58af7a4337df8957bb4f8c5b6b670fd9233252
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1594892Reviewed-by: Joe Mason <joenotcharles@google.com>
Commit-Queue: Sean Risser <srisser@google.com>
Cr-Commit-Position: refs/heads/master@{#656437}