Cleanup Tool WebUI: Add functional HTML and skeleton JS for main content

chrome/browser/resources/cleanup_tool/cleanup_browser_proxy.js

 // Copyright 2017 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.
 
 /**
  * @fileoverview Helper object and related behavior that encapsulate messaging
  * between JS and C++ for interacting with the Chrome Cleanup Tool.
  */
 
 /**
  * @typedef {{
  *   hasScanResults: boolean,
  *   isInfected: boolean,
  *   detectionStatusText: string,
  *   detectionTimeText: string,
- * }};
+ * }}
  */
 var LastScanResult;
 
 cr.define('cleanup', function() {
   /** @interface */
   function CleanupBrowserProxy() {}
 
   CleanupBrowserProxy.prototype = {
     /**
      * Fetch the result of the latest Chrome Cleanup Tool scanning task.
@@ skipping 14 matching lines @@
     requestLastScanResult: function() {
       return cr.sendWithPromise('requestLastScanResult');
     },
   };
 
   return {
     CleanupBrowserProxy: CleanupBrowserProxy,
     CleanupBrowserProxyImpl: CleanupBrowserProxyImpl,
   }
 });