Split out tests of private scripts from Internals to PrivateScriptTest

Source/core/testing/PrivateScriptTest.js

 // Copyright 2014 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.
 
 "use strict";
 
-installClass("Internals", function(global) {
+installClass("PrivateScriptTest", function(global) {
     var InternalsPrototype = Object.create(Element.prototype);
 
     InternalsPrototype.constructor = function() {
         this.m_shortAttribute = -1;
         this.m_stringAttribute = "xxx";
         this.m_nodeAttribute = null;
     }
 
     InternalsPrototype.doNothing = function() {
     }
@@ skipping 87 matching lines @@
         set: function(value) { this.m_stringAttribute = value; }
     });
 
     Object.defineProperty(InternalsPrototype, "nodeAttribute", {
         get: function() { return this.m_nodeAttribute; },
         set: function(value) { this.m_nodeAttribute = value; }
     });
 
     return InternalsPrototype;
 });