DevTools: Clean up the Event Listeners pane data representation

Source/devtools/front_end/sdk/Script.js

 /*
  * Copyright (C) 2008 Apple 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
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 65 matching lines @@
 WebInspector.Script.prototype = {
     /**
      * @return {boolean}
      */
     isContentScript: function()
     {
         return this._isContentScript;
     },
 
     /**
+     * @return {boolean}
+     */
+    isInternalScript: function()
+    {
+        return this._isInternalScript;
+    },
+
+    /**
      * @override
      * @return {string}
      */
     contentURL: function()
     {
         return this.sourceURL;
     },
 
     /**
      * @override
@@ skipping 163 matching lines @@
     /**
      * @return {boolean}
      */
     isInlineScriptWithSourceURL: function()
     {
         return !!this.hasSourceURL && this.isInlineScript();
     },
 
     __proto__: WebInspector.SDKObject.prototype
 }