commit ed9bd92e00099eddda86b32fd2bb4896cb44cd51
author Xiyuan Xia <xiyuan@google.com> Thu Apr 07 14:45:16 2016 -0700
committer Xiyuan Xia <xiyuan@google.com> Fri Apr 15 20:08:36 2016 +0000
tree ce63afd1633787c06664e6b7483e2ac925c55f23
parent 371615b025bdd8106faf65c1ba7439a1236f21bc

Follow up on AllowKioskAppControlChromeVersion policy CL

- Update header includes, adding missed and removing unused.
- UpdateCheckAllowedKioskPinWithNoRequiredVersion verifies target
  version prefix is empty.
- Change RealSystemProvider's required platform version variable to
  be a RetryPollVariable to handle D-Bus call failure.
- Update ChromeOSPolicy to defer update check when kiosk pin policy
  is effective but system provider does not set the required platform
  version.

BUG=chromium:577783

Change-Id: Id5400d09fff69001a37e367fff9ede1664c2e060