Handle the case where the branch is not there yet.

BUG=None
TEST=None

Change-Id: I3e7e92d049d6587b0695e8b3f2a525eb063dbc5f
Reviewed-on: https://gerrit-int.chromium.org/35005
Reviewed-by: Luis Lozano <llozano@chromium.org>
Commit-Queue: Yunlian Jiang <yunlian@google.com>
Tested-by: Yunlian Jiang <yunlian@google.com>
1 file changed