[
  {
    "os": [
      "win",
      "mac"
    ],
    "simple_policy_pref_mapping_test": {
      "pref_name": "total_memory_limit_mb",
      "pref_location": "local_state",
      "default_value": 1024,
      "values_to_test": [
        1024,
        2048
      ]
    }
  }
]