DevTools: Move DOMNode.appropriateSelectorFor() into DOMPresentationUtil.

Source/devtools/front_end/StylesSidebarPane.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * 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
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 736 matching lines @@
 
     _createNewRule: function(event)
     {
         event.consume();
         this.expand();
         this.addBlankSection().startEditingSelector();
     },
 
     addBlankSection: function()
     {
-        var blankSection = new WebInspector.BlankStylePropertiesSection(this, this.node ? this.node.appropriateSelectorFor(true) : "");
+        var blankSection = new WebInspector.BlankStylePropertiesSection(this, this.node ? WebInspector.DOMPresentationUtils.appropriateSelectorFor(this.node, true) : "");
 
         var elementStyleSection = this.sections[0][1];
         this._sectionsContainer.insertBefore(blankSection.element, elementStyleSection.element.nextSibling);
 
         this.sections[0].splice(2, 0, blankSection);
 
         return blankSection;
     },
 
     removeSection: function(section)
@@ skipping 2128 matching lines @@
             return;
         }
 
         var results = this._cssCompletions.startsWith(prefix);
         var selectedIndex = this._cssCompletions.mostUsedOf(results);
         completionsReadyCallback(results, selectedIndex);
     },
 
     __proto__: WebInspector.TextPrompt.prototype
 }