The only user of this method needs to apply two patches from two
different repos in a try job. Extending the method to handle this.

BUG=628259
R=agable@chromium.org

Change-Id: Ia119780d1323add0094631e5c291b0e7a573e6e5
Reviewed-on: https://chromium-review.googlesource.com/588008
Commit-Queue: Sergey Berezin <sergeyberezin@chromium.org>
Reviewed-by: Aaron Gable <agable@chromium.org>