GitLab

Defaults to "$root_build_dir/apks/" if base_bundle_path is not
specified.

Bug: 863113
Change-Id: Ia41ab38bce589ea95b462ec0ebf705c17ebd91a9
Reviewed-on: https://chromium-review.googlesource.com/1136987
Commit-Queue: Ben Mason <benmason@chromium.org>
Reviewed-by: David Turner <digit@chromium.org>
Reviewed-by: agrieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575295}