bluetooth: Add Device service for chrome://bluetooth-internals.

device/bluetooth/public/interfaces/adapter.mojom

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module bluetooth.mojom;
 
+import "device/bluetooth/public/interfaces/device.mojom";
+
 struct AdapterInfo {
   string address;
   string name;
   bool initialized;
   bool present;
   bool powered;
   bool discoverable;
   bool discovering;
 };
 
-struct DeviceInfo {
-  string? name;
-  string name_for_display;
-  string id;
-  string address;
-};
-
 interface Adapter {
   // Gets basic information about the adapter.
   GetInfo() => (AdapterInfo info);
 
+  // Gets the Device service for the device at the given address.
+  GetDevice(string address) => (Device? device);
+
   // Retrieves the list of the devices known by the adapter including Connected
   // Devices, GATT Connected Devices, Paired Devices and Devices discovered
   // during a classic or low-energy scan.
   GetDevices() => (array<DeviceInfo> devices);
 
   // Sets the client that listens for the adapter's events.
   SetClient(AdapterClient client);
 };
 
 interface AdapterClient {
   // Called the first time a device is discovered.
   DeviceAdded(DeviceInfo device);
 
   // Called after the device hasn't been seen for 3 minutes.
   DeviceRemoved(DeviceInfo device);
 };
 
 interface AdapterFactory {
   // Gets an Adapter interface. Returns null if Bluetooth is not supported.
   GetAdapter() => (Adapter? adapter);
-};
+};