GitLab

Adds a feature flag to control whether the canonical URL is shared.

Bug: none
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I5b70667ab1743af8ea5845f541dfc0f621ba9314
Reviewed-on: https://chromium-review.googlesource.com/744973
Commit-Queue: Peter Lee <pkl@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512762}