[Devtools][Code health] Changed NetworkRequest.url to proper getter/setter

third_party/WebKit/Source/devtools/front_end/network/RequestHeadersView.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) IBM Corp. 2009  All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 124 matching lines @@
     if (value === '')
       div.classList.add('empty-value');
     if (errorDecoding)
       div.createChild('span', 'header-decode-error').textContent = Common.UIString('(unable to decode value)');
     else
       div.textContent = value;
     return div;
   }
 
   _refreshURL() {
-    this._urlItem.title = this._formatHeader(Common.UIString('Request URL'), this._request.url);
+    this._urlItem.title = this._formatHeader(Common.UIString('Request URL'), this._request.url());
   }
 
   _refreshQueryString() {
     var queryString = this._request.queryString();
     var queryParameters = this._request.queryParameters;
     this._queryStringCategory.hidden = !queryParameters;
     if (queryParameters) {
       this._refreshParams(
           Common.UIString('Query String Parameters'), queryParameters, queryString, this._queryStringCategory);
     }
@@ skipping 365 matching lines @@
     this._expandedSetting.set(true);
   }
 
   /**
    * @override
    */
   oncollapse() {
     this._expandedSetting.set(false);
   }
 };