Use "unsigned" rather than "unsigned long" for C++ code interacting with WebIDL's "unsigned long".

Source/modules/speech/SpeechRecognition.cpp

 /*
  * Copyright (C) 2012 Google 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:
  *  * 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 copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 90 matching lines @@
     dispatchEvent(Event::create(EventTypeNames::soundend));
 }
 
 void SpeechRecognition::didEndAudio()
 {
     dispatchEvent(Event::create(EventTypeNames::audioend));
 }
 
 void SpeechRecognition::didReceiveResults(const HeapVector<Member<SpeechRecognitionResult> >& newFinalResults, const HeapVector<Member<SpeechRecognitionResult> >& currentInterimResults)
 {
-    unsigned long resultIndex = m_finalResults.size();
+    size_t resultIndex = m_finalResults.size();
 
     for (size_t i = 0; i < newFinalResults.size(); ++i)
         m_finalResults.append(newFinalResults[i]);
 
     HeapVector<Member<SpeechRecognitionResult> > results = m_finalResults;
     for (size_t i = 0; i < currentInterimResults.size(); ++i)
         results.append(currentInterimResults[i]);
 
     dispatchEvent(SpeechRecognitionEvent::createResult(resultIndex, results));
 }
@@ skipping 76 matching lines @@
     visitor->trace(m_grammars);
     visitor->trace(m_audioTrack);
 #if ENABLE(OILPAN)
     visitor->trace(m_controller);
 #endif
     visitor->trace(m_finalResults);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink