[DevTools] Fix custom user agent override not applying.

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

 // Copyright (c) 2015 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.
 
 /**
  * @constructor
  * @extends {WebInspector.VBox}
  */
 WebInspector.NetworkConfigView = function()
 {
@@ skipping 63 matching lines @@
         this._userAgentTypeChanged(this._autoUserAgentRadio);
     },
 
     _userAgentChanged: function()
     {
         this._autoUserAgent.value = WebInspector.multitargetNetworkManager.userAgentOverride() || WebInspector.UIString("Default");
     },
 
     _customUserAgentChanged: function()
     {
-        if (!this._customUserAgent.checked)
+        if (!this._customUserAgentRadio.checked)
             return;
         WebInspector.multitargetNetworkManager.setCustomUserAgentOverride(this._customUserAgentSetting.get());
     },
 
     /**
      * @param {!Element} radioElement
      */
     _userAgentTypeChanged: function(radioElement)
     {
         var useCustomUA = radioElement === this._customUserAgentRadio;
@@ skipping 149 matching lines @@
      * @param {!WebInspector.Context} context
      * @param {string} actionId
      * @return {boolean}
      */
     handleAction: function(context, actionId)
     {
         WebInspector.inspectorView.showViewInDrawer("network.config");
         return true;
     }
 }