tree 2b44ea065267f3bcd49829d749336514955c02a3
parent a4596961c1167b850f683a2d82b0c8d62c40cf56
author Allen Li <ayatane@google.com> 1488586847 -0800
committer chrome-bot <chrome-bot@chromium.org> 1489204348 -0800

Add _lock convenience method

This will get reused later

BUG=None
TEST=None

Change-Id: I00af69980c86e8c78b9eab18f263e3e70e3f30ff
Reviewed-on: https://chromium-review.googlesource.com/450909
Commit-Ready: Allen Li <ayatane@chromium.org>
Tested-by: Allen Li <ayatane@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>