Mojo JS bindings: add support to generate "dual-mode" code.

chrome/browser/resources/usb_internals/usb_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 usb_internals.html, served from chrome://usb-internals/.
  */
 
 (function() {
 // Connection to the UsbInternalsPageHandler instance running in the browser
 // process.
 let pageHandler = null;
 
 function refreshDeviceList() {
   pageHandler.getTestDevices().then(function(response) {
     let tableBody = $('test-device-list');
     tableBody.innerHTML = '';
     for (let device of response.devices) {
       let row = document.createElement('tr');
       let name = document.createElement('td');
       let serialNumber = document.createElement('td');
       let landingPage = document.createElement('td');
       let remove = document.createElement('td');
       let removeButton = document.createElement('button');
       name.textContent = device.name;
-      serialNumber.textContent = device.serial_number;
-      landingPage.textContent = device.landing_page.url;
+      serialNumber.textContent = device.serialNumber;
+      landingPage.textContent = device.landingPage.url;
       removeButton.addEventListener('click', function() {
         pageHandler.removeDeviceForTesting(device.guid).then(refreshDeviceList);
       });
       removeButton.textContent = 'Remove';
       row.appendChild(name);
       row.appendChild(serialNumber);
       row.appendChild(landingPage);
       remove.appendChild(removeButton);
       row.appendChild(remove);
       tableBody.appendChild(row);
     }
   });
 }
 
 function addTestDevice(event) {
   pageHandler
       .addDeviceForTesting(
           $('test-device-name').value, $('test-device-serial').value,
           $('test-device-landing-page').value)
       .then(function(response) {
         if (response.success)
           refreshDeviceList();
         $('add-test-device-result').textContent = response.message;
         $('add-test-device-result').className =
             response.success ? 'action-success' : 'action-failure';
       });
   event.preventDefault();
 }
 
-function initializeProxies() {
-  return importModules([
-           'chrome/browser/ui/webui/usb_internals/usb_internals.mojom',
-           'content/public/renderer/frame_interfaces',
-         ])
-      .then(function(modules) {
-        let mojom = modules[0];
-        let frameInterfaces = modules[1];
+document.addEventListener('DOMContentLoaded', function() {
+  pageHandler = new mojom.UsbInternalsPageHandlerPtr;
+  Mojo.bindInterface(
+      mojom.UsbInternalsPageHandler.name, mojo.makeRequest(pageHandler).handle);
 
-        pageHandler = new mojom.UsbInternalsPageHandlerPtr(
-            frameInterfaces.getInterface(mojom.UsbInternalsPageHandler.name));
-      });
-}
-
-document.addEventListener('DOMContentLoaded', function() {
-  initializeProxies().then(function() {
-    $('add-test-device-form').addEventListener('submit', addTestDevice);
-    refreshDeviceList();
-  });
+  $('add-test-device-form').addEventListener('submit', addTestDevice);
+  refreshDeviceList();
 });
 })();