Note that gerrit reviews look like this: https://chromium-review.googlesource.com/c/392366/

That's a six-digit number, which corresponds to an SVN revision: crrev.com/392366 -> https://chromium.googlesource.com/chromium/src/+/e9f5f0c1aa477afc87c4c42004d6f5f1077048fa

If we're going to support this, we're going to need
a) A good story for how to disambiguate those, and I think
b) A total revamp of the indexing/redirecting system.

Issue 709114 has been merged into this issue.

https://chromium-review.googlesource.com/c/470167/

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/0a779b0c04441a0d04cb0abf985780e674e0c666

commit 0a779b0c04441a0d04cb0abf985780e674e0c666
Author: Aaron Gable <agable@chromium.org>
Date: Thu Apr 06 22:47:35 2017

Add gerrit support to cr-rev

Bug:  601228 
Change-Id: I1b6220ec2f329a8c422cdb4fd019f0b204285b44
Reviewed-on: https://chromium-review.googlesource.com/470167
Commit-Queue: Aaron Gable <agable@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>

[modify] https://crrev.com/0a779b0c04441a0d04cb0abf985780e674e0c666/appengine/cr_rev/appengine_module/cr_rev/test/controller_test.py
[modify] https://crrev.com/0a779b0c04441a0d04cb0abf985780e674e0c666/appengine/cr_rev/appengine_module/cr_rev/models.py
[modify] https://crrev.com/0a779b0c04441a0d04cb0abf985780e674e0c666/appengine/cr_rev/appengine_module/cr_rev/controller.py

Deployed. The short urls are "crrev.com/c/N" for chromium-review and "crrev.com/i/N" for chrome-internal-review.