GitLab

This CL should not change behavior. We could probably remove the param
from WebContentsDelegate::AddWebContents but some delegates actually
set it, so the change would be more complicated and could change
behavior.

Bug: None
Change-Id: I2b25c7ae4fb86c2aad386697832bb5017ea7744f
Reviewed-on: https://chromium-review.googlesource.com/655126Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Charlie Harrison <csharrison@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501385}