Have the wrapper shutdown logging on the way out, allow for overrides.
Have the wrapper shutdown logging on the way out, allow for overrides.

BUG=chromium-os:32910
TEST=None

Change-Id: I0c1e6c56fe1664cc1e76db3f5b4f3a01fbf67696
Reviewed-on: https://gerrit.chromium.org/gerrit/36593
Commit-Ready: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>
Tested-by: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>
Reviewed-by: Ryan Cui <5ce1592d53754a87a44fc2eb7b63d5f77cf50fdb@chromium.org>

zhang0137/chromite,chadversary/chromiumos.chromite,zhang0137/chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,coreos/chromite,coreos/chromite,coreos/chromite,zhang0137/chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite