Added the skeleton for the flagging framework.

BUG=None
TEST=None

Change-Id: I72c37ac70ed2adca588ad9866a6bcc26775aed8b
Reviewed-on: https://gerrit-int.chromium.org/39096
Reviewed-by: Luis Lozano <llozano@chromium.org>
Tested-by: Yuheng Long <yuhenglong@google.com>
Commit-Queue: Yuheng Long <yuhenglong@google.com>
12 files changed