Disable two tests in mojo_system_unittests that are suspected to be timing out

BUG=663998
TBR=pdr@chromium.org, timloh@chromium.org

Review-Url: https://codereview.chromium.org/2497203002
Cr-Commit-Position: refs/heads/master@{#431847}


CrOS-Libchrome-Original-Commit: aae520affa1d2c4397bf4d4758a9ff48d5a0cc88
2 files changed
tree: eed5c2aee45f7fab2e4de03f58f456664734bdad
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/