Split out tests of private scripts from Internals to PrivateScriptTest

Source/core/testing/PrivateScriptTest.h

+// 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.
+
+#ifndef PrivateScriptTest_h
+#define PrivateScriptTest_h
+
+#include "platform/heap/Handle.h"
+#include "wtf/RefCounted.h"
+
+namespace WebCore {
+
+class PrivateScriptTest : public GarbageCollected<PrivateScriptTest> {
+public:
+    static PrivateScriptTest* create()
+    {
+        return new PrivateScriptTest();
+    }
+
+    void trace(Visitor*) { }
+
+private:
+    PrivateScriptTest() { }
+};
+
+} // namespace WebCore
+
+#endif