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

device/bluetooth/public/interfaces/adapter.mojom

Index: device/bluetooth/public/interfaces/adapter.mojom
diff --git a/device/bluetooth/public/interfaces/adapter.mojom b/device/bluetooth/public/interfaces/adapter.mojom
index 0ac42f5f14b876aaab61951025d826263ee1058f..959c8e35ee91e13c23dae917d74f89515cd160e8 100644
--- a/device/bluetooth/public/interfaces/adapter.mojom
+++ b/device/bluetooth/public/interfaces/adapter.mojom
@@ -4,6 +4,8 @@
 
 module bluetooth.mojom;
 
+import "device/bluetooth/public/interfaces/device.mojom";
+
 struct AdapterInfo {
   string address;
   string name;
@@ -14,17 +16,13 @@ struct AdapterInfo {
   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.
@@ -45,4 +43,4 @@ interface AdapterClient {
 interface AdapterFactory {
   // Gets an Adapter interface. Returns null if Bluetooth is not supported.
   GetAdapter() => (Adapter? adapter);
-};
+};