chromium/extensions/test/data/manifest_tests/nacl_module_v3.json

{
  "name": "NaClExtensionTest",
  "version": "0.1",
  "manifest_version": 3,
  "description": "Test extensions for Native Client.",
  "nacl_modules": [{
    "path": "dummy.nmf",
    "mime_type": "application/pdf"
  }]
}