POC for adapter service

chrome/browser/resources/bluetooth_internals/bluetooth_internals.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 bluetooth_internals.html, served from
  *     chrome://bluetooth-internals/.
  */
+(function() {
+  let adapterService = null;
+  let adapterClient = null;
+  let adapterHandle = null;
+  let clientHandle = null;
 
-document.addEventListener('DOMContentLoaded', function() {
-  console.log('Welcome to Bluetooth Internals.');
-});
+  /**
+   * Helper to convert callback-based define() API to a promise-based API.
+   * @param {!Array<string>} moduleNames
+   * @return {!Promise}
+   */
+  function importModules(moduleNames) {
+    return new Promise(function(resolve, reject) {
+      define(moduleNames, function(var_args) {
+        resolve(Array.from(arguments));
+      });
+    });
+  }
+
+  /**
+   * Initializes Mojo proxies for page and Bluetooth services.
+   * @return {!Promise}
+   */
+  function initializeProxies() {
+    return importModules([
+             'content/public/renderer/frame_interfaces',
+             'chrome/browser/ui/webui/bluetooth_internals/' +
+                 'bluetooth_internals.mojom',
+             'device/bluetooth/public/interfaces/bluetooth.mojom',
+             'mojo/public/js/connection',
+           ])
+      .then(([frameInterfaces, mojom, bluetooth, connection]) => {
+
+          class AdapterClientImpl extends bluetooth.AdapterClient.stubClass {
+            constructor() { super(); }
+
+            /**
+             * Prints added device to console
+             * @param {!Object} device the device that was added
+             */
+            deviceAdded(device) {
+              console.log('Device added');
+              console.log(device);
+            }
+
+            /**
+             * Prints removed device to console
+             * @param {!Object} device the device that was removed
+             */
+            deviceRemoved(device) {
+              console.log('Device added');
+              console.log(device);
+            }
+          }
+
+
+          adapterService = connection.bindHandleToProxy(
+            frameInterfaces.getInterface(bluetooth.Adapter.name),
+            bluetooth.Adapter);
+
+          // Create a message pipe and bind one end to client implementation
+          adapterClient = new AdapterClientImpl();
+          clientHandle = connection.bindStubDerivedImpl(adapterClient);
+          adapterService.setClient(clientHandle);
+        });
+  }
+
+  document.addEventListener('DOMContentLoaded', function() {
+    initializeProxies()
+        .then(() => {
+          return adapterService.getDevices();
+        })
+        .then((response) => console.log(response.devices));
+  });
+})();