Suppress lock noise for the the watchdog.
Suppress lock noise for the the watchdog.

The watcher will *always* be blocked, thus there is no point in stating
"taking write lock" as currently occurs.

BUG=None
TEST=None

Change-Id: I1f960afee0ee804e80781ad9c0b06cd518f29e8b
Reviewed-on: https://gerrit.chromium.org/gerrit/22548
Commit-Ready: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>
Tested-by: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>

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