Tracking bug for work on CrOS MultiDevice APIs:
(1) DeviceSync API: This API syncs metadata about other devices tied to a given Google account. It contacts the CryptAuth back-end to enroll the current device and sync down new data about other devices.
(2) SecureChannnel API: This API gives clients the ability to establish connections to remote devices synced via the DeviceSync API. Once a communication channel is established, the API allows clients to send and receive messages through the channel.