Move importModules function to util.js

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
@@ skipping 41 matching lines @@
         $('test-device-allowed-origin').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();
   }
 
-  /**
-   * 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.prototype.slice.call(arguments, 0));
-      });
-    });
-  }
-
   function initializeProxies() {
     return importModules([
       'mojo/public/js/connection',
       'chrome/browser/ui/webui/usb_internals/usb_internals.mojom',
       'content/public/renderer/frame_interfaces',
     ]).then(function(modules) {
       let connection = modules[0];
       let mojom = modules[1];
       let frameInterfaces = modules[2];
 
       pageHandler = connection.bindHandleToProxy(
           frameInterfaces.getInterface(mojom.UsbInternalsPageHandler.name),
           mojom.UsbInternalsPageHandler);
     });
   }
 
   document.addEventListener('DOMContentLoaded', function() {
     initializeProxies().then(function() {
       $('add-test-device-form').addEventListener('submit', addTestDevice);
       refreshDeviceList();
     });
   });
 })();