POC for adapter service

device/bluetooth/public/interfaces/bluetooth.mojom

Index: device/bluetooth/public/interfaces/bluetooth.mojom
diff --git a/device/bluetooth/public/interfaces/bluetooth.mojom b/device/bluetooth/public/interfaces/bluetooth.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..db12aea828d2582b30f8685c81f4689c9a9aac4b
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+++ b/device/bluetooth/public/interfaces/bluetooth.mojom
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+// 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;
+
+struct DeviceInfo {
+  string? name;
+  string name_for_display;
+  string id;
+  string address;
+};
+
+interface Adapter {
+  // Retrieves the list of the devices known by the adapter including Connected
+  // Devices, GATT Connected Devices, Paired Devices and Devices discovered
+  // during a classic low-energy scan.
+  GetDevices() => (array<DeviceInfo> devices);
+
+  SetClient(AdapterClient client);
+};
+
+interface AdapterClient {
+  // Called the fisrt time a device is discovered.
+  DeviceAdded(DeviceInfo device);
+
+  // Called after the device hasn't been seen for 3 minutes.
+  DeviceRemoved(DeviceInfo device);
+};