GitLab

This moves helper code that the browser uses over to the browser/
directory and removes the DEPS rules that were left to support this
violation.

R=avi@chromium.org

Bug: 866140
Change-Id: Ib49c7e5e6f64f34db87a73ef5368384ee73e1c19
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2133876Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755921}