tree dd7b2c43eac9446b12fb7d388c1ff49db2119f81
parent 40d86b22363fd9461e67ad288e0273bed509937b
author Alex Deymo <deymo@google.com> 1441387740 -0700
committer Alex Deymo <deymo@google.com> 1441407621 -0700

New BootControlInterface implementation for Android.

This patch hides the platform-specific construction of a
BootControlInterface in a factory method shared by both Android and
Chromium OS. This also include a stub implementation for Android.

Bug: 23754584,23084776
TEST=emerge-link update_engine; `mma -i` builds these files without problem.

Change-Id: I43532e5cff1dc474453160f418ddd3c448f31938