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() {
+  /**
+   * Initializes Mojo proxies for page and Bluetooth services.
+   * @return {!Promise<interfaces.BluetoothAdapter.Adapter>} resolves with
+   *     Adapter if acquired, rejects if Bluetooth is not supported.
+   */
+  function initializeProxies() {
+    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, {
+        BluetoothAdapter: bluetoothAdapter,
+        BluetoothDevice: bluetoothDevice,
+        Connection: connection,
+      });
+
+      var adapterFactory = connection.bindHandleToProxy(
+          frameInterfaces.getInterface(bluetoothAdapter.AdapterFactory.name),
+          bluetoothAdapter.AdapterFactory);
+
+      // Get an Adapter service.
+      return adapterFactory.getAdapter();
+    }).then(function(response) {
+      if (!response.adapter) {
+        throw new Error('Bluetooth Not Supported on this platform.');
+      }
+
+      return interfaces.Connection.bindHandleToProxy(
+          response.adapter,
+          interfaces.BluetoothAdapter.Adapter);
+    });
+  }
+
+  return {
+    initialize: initializeProxies,
+  };
+});