mojo: Fix c++ bindings so serialization of empty arrays doesn't crash.

BUG=none

Review URL: https://codereview.chromium.org/659313006

Cr-Commit-Position: refs/heads/master@{#300146}


CrOS-Libchrome-Original-Commit: c9f03f14314280243387ab3ae5e9d39302ac4fd8
2 files changed
tree: a0413d9ff3a274ce458ecfa0dd58c25ac8350ef2
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/