Cleanup PreferenceMACs on browser_tests startup
and prevent proliferation of scoped_dir subkeys under it in the future.

BUG=721245
R=jam@chromium.org

Review-Url: https://codereview.chromium.org/2893703002 .
Cr-Commit-Position: refs/heads/master@{#472565}


CrOS-Libchrome-Original-Commit: dfcdd8a05d8e0867a68cfc366fb7e7d79b3a318f
2 files changed
tree: 6e31a23a6c62b3da91693f5314b0e4730ebaa497
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/