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

device/bluetooth/public/interfaces/le_device.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;
+
+struct LEDeviceInfo {
+  string? name;

[ortuno, 2016/10/10 00:11:20]

What about nameForDisplay? You will probably want to use that when showing
devices' names.

[mbrunson, 2016/10/10 19:21:28]

Unless I'm missing something, GetNameForDisplay() uses UTF-16 strings which
can't be transferred over Mojo. I figured converting them to UTF-8 defeats the
purpose of the original encoding.

[ortuno, 2016/10/11 00:45:45]

The purpose of GetNameForDisplay is not only to return a string16 but also to
return a name that is appropriate for displaying. If the device has no name,
GetNameForDisplay will construct a name based on the available information e.g.
address, appearance, etc. So for example for a mouse with no name, GetName()
will return no name but GetNameForDisplay() will return "Mouse (00:00:00:00:00)"
which is more appropriate for displaying.

GetNameForDisplay should be used whenever the device's name is being presented
to the user.

+  string id;
+  string address;
+};
+
+interface LEDevice {

[ortuno, 2016/10/10 00:11:20]

Since this is just a thin wrapper around the current implementation I don't
think we have a way to distinguish between LE devices and classic devices. So I
think this should just be called "Device".

scheib: any thoughts?

[mbrunson, 2016/10/10 19:21:28]

I'll change it for now.

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

[ortuno, 2016/10/10 00:11:20]

nit: lower-case after comma. Also I think you mean "device" instead of "adapter.

[mbrunson, 2016/10/10 19:21:28]

Done.

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