bluetooth: Componentize device list in chrome://bluetooth-internals.

chrome/browser/resources/bluetooth_internals/interfaces.js

+// 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.
+
+/**
+ * Javascript for Mojo interface helpers, served from
+ *     chrome://bluetooth-internals/.
+ */
+
+cr.define('interfaces', function() {
+  /**
+   * Imports Mojo interfaces and adds them to window.interfaces.
+   * @return {Promise}
+   */
+  function importInterfaces() {
+    return importModules([
+      'content/public/renderer/frame_interfaces',
+      'device/bluetooth/public/interfaces/adapter.mojom',
+      'device/bluetooth/public/interfaces/device.mojom',
+      'mojo/public/js/connection',
+    ]).then(function([frameInterfaces, bluetoothAdapter, bluetoothDevice,
+        connection]) {
+      Object.assign(interfaces, {

[Dan Beam, 2016/11/09 18:00:32]

this might require compiler integration as is more lines than:

interfaces.BluetoothAdapter = bluetoothAdapter;
...

can we not use Object.assign() here?

[mbrunson, 2016/11/10 01:02:14]

Done.

+        BluetoothAdapter: bluetoothAdapter,
+        BluetoothDevice: bluetoothDevice,
+        Connection: connection,
+        FrameInterfaces: frameInterfaces,
+      });
+    });
+  }
+
+  return {
+    BluetoothAdapter: {},
+    BluetoothDevice: {},
+    Connection: {},
+    FrameInterfaces: {},

[Dan Beam, 2016/11/09 18:00:32]

what's going on with these {}?

[mbrunson, 2016/11/10 01:02:14]

It was a hint that these values were going to be exported from this module, but
I can remove them. Done.

+    importInterfaces: importInterfaces,
+  };
+});