Add Vibration API layout tests that inspect internal state.

Source/modules/vibration/testing/InternalsVibration.cpp

 /*
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 #include "modules/vibration/NavigatorVibration.h"
 
 namespace WebCore {
 
 bool InternalsVibration::isVibrating(Internals* internals, Document* document)
 {
     ASSERT(internals && document && document->page());
     return NavigatorVibration::from(document->page())->isVibrating();
 }
 
+Vector<unsigned> InternalsVibration::pendingVibrationPattern(Internals* internals, Document* document)
+{
+    ASSERT(internals && document && document->page());
+    return NavigatorVibration::from(document->page())->pattern();
+}
+
 } // namespace WebCore