Explicitly set test_proto.proto's syntax.

No behavior change, but new protobuf versions warn about the absence of this
line and all other our .proto files have it.

BUG=525255

Review URL: https://codereview.chromium.org/1318083004

Cr-Commit-Position: refs/heads/master@{#346007}


CrOS-Libchrome-Original-Commit: 869255adad624761c098b6e3508b66d5f178a628
1 file changed
tree: 29a48ba475445324d905dfbfd64f46ee9250a7de
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/