If you name your branches "bug-123-fix-foobar" or "123-fix-foobar", git cl
upload will automatically populate the "Bug: " line in the cl description with
123.

Bug: 778252
Change-Id: I5bf570d5d44e8681c552a52a8b5ed0c64ce82284
Reviewed-on: https://chromium-review.googlesource.com/738237
Commit-Queue: Aaron Gable <agable@chromium.org>
Reviewed-by: Aaron Gable <agable@chromium.org>