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

device/bluetooth/public/interfaces/device.mojom

Index: device/bluetooth/public/interfaces/device.mojom
diff --git a/device/bluetooth/public/interfaces/device.mojom b/device/bluetooth/public/interfaces/device.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..f82559dd1d2a2acb84b02f5c480e6414cc8a961c
--- /dev/null
+++ b/device/bluetooth/public/interfaces/device.mojom
@@ -0,0 +1,17 @@
+// 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;

[dpapad, 2016/10/11 21:58:32]

Does this have to be a different file for technical reasons?

I personally would prefer to keep closely related interfaces in a single mojom
file until there is a need to re-use DeviceInfo and Device from places where
Adapter, AdapterClient etc are not used.

[mbrunson, 2016/10/11 23:15:33]

Less of a technical reason and more for organization. The layout of the C++
implementation for the interfaces closely match the mojom declarations. We try
to keep things separate conceptually unless it's necessary to keep them
together.

+
+struct DeviceInfo {
+  string? name;
+  string name_for_display;
+  string address;
+};
+
+interface Device {
+  // Gets basic information about the device.
+  // Returns null, If no device is available.

[dpapad, 2016/10/11 21:58:32]

Nit (optional): Maximize 80col usage before braking line?

// Gets basic information about the device. Returns null, If no device is
// available.   

[mbrunson, 2016/10/11 23:15:33]

Done.

+  GetInfo() => (DeviceInfo? info);
+};