DevTools: fix author shadow dom inspection mode, speacial-case ua. Fix crash from the bug.

Source/devtools/front_end/ElementsPanel.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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 94 matching lines @@
     this._extensionSidebarPanes = [];
 
     WebInspector.dockController.addEventListener(WebInspector.DockController.Events.DockSideChanged, this._dockSideChanged.bind(this));
     WebInspector.settings.splitVerticallyWhenDockedToRight.addChangeListener(this._dockSideChanged.bind(this));
     this._dockSideChanged();
 
     this._popoverHelper = new WebInspector.PopoverHelper(this.element, this._getPopoverAnchor.bind(this), this._showPopover.bind(this));
     this._popoverHelper.setTimeout(0);
 
     WebInspector.domAgent.addEventListener(WebInspector.DOMAgent.Events.DocumentUpdated, this._documentUpdatedEvent, this);
-    WebInspector.settings.showShadowDOM.addChangeListener(this._showShadowDOMChanged.bind(this));
+    WebInspector.settings.showUAShadowDOM.addChangeListener(this._showUAShadowDOMChanged.bind(this));
 
     WebInspector.cssModel.addEventListener(WebInspector.CSSStyleModel.Events.ModelWasEnabled, this._updateSidebars, this);
 }
 
 WebInspector.ElementsPanel.prototype = {
     _updateTreeOutlineVisibleWidth: function()
     {
         if (!this.treeOutline)
             return;
 
@@ skipping 995 matching lines @@
      * @param {!DOMAgent.NodeId} nodeId
      */
     revealAndSelectNode: function(nodeId)
     {
         WebInspector.inspectorView.setCurrentPanel(this);
 
         var node = WebInspector.domAgent.nodeForId(nodeId);
         if (!node)
             return;
 
-        node = WebInspector.settings.showShadowDOM.get() ? node : this._leaveUserAgentShadowDOM(node);
+        node = WebInspector.settings.showUAShadowDOM.get() ? node : this._leaveUserAgentShadowDOM(node);
         WebInspector.domAgent.highlightDOMNodeForTwoSeconds(nodeId);
         this.selectDOMNode(node, true);
     },
 
     /** 
      * @param {!WebInspector.ContextMenu} contextMenu
      * @param {!Object} target
      */
     appendApplicableItems: function(event, contextMenu, target)
     {
@@ skipping 37 matching lines @@
         var contextMenu = new WebInspector.ContextMenu(event);
         contextMenu.show();
     },
 
     _dockSideChanged: function()
     {
         var vertically = WebInspector.dockController.isVertical() && WebInspector.settings.splitVerticallyWhenDockedToRight.get();
         this._splitVertically(vertically);
     },
 
-    _showShadowDOMChanged: function()
+    _showUAShadowDOMChanged: function()
     {
         this.treeOutline.update();
     },
 
     /**
      * @param {boolean} vertically
      */
     _splitVertically: function(vertically)
     {
         if (this.sidebarPaneView && vertically === !this._splitView.isVertical())
@@ skipping 145 matching lines @@
             return;
 
         if (WebInspector.inspectElementModeController && WebInspector.inspectElementModeController.enabled()) {
             InspectorFrontendHost.bringToFront();
             WebInspector.inspectElementModeController.disable();
         }
 
         /** @type {!WebInspector.ElementsPanel} */ (WebInspector.inspectorView.panel("elements")).revealAndSelectNode(node.id);
     }
 }