Use "int" instead of "long" for bindings where the WebIDL uses "long".

Source/modules/mediastream/RTCDataChannel.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:
  * 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 109 matching lines @@
     case ReadyStateClosing:
         return ASCIILiteral("closing");
     case ReadyStateClosed:
         return ASCIILiteral("closed");
     }
 
     ASSERT_NOT_REACHED();
     return String();
 }
 
-unsigned long RTCDataChannel::bufferedAmount() const
+unsigned RTCDataChannel::bufferedAmount() const
 {
     return m_handler->bufferedAmount();
 }
 
 String RTCDataChannel::binaryType() const
 {
     switch (m_binaryType) {
     case BinaryTypeBlob:
         return ASCIILiteral("blob");
     case BinaryTypeArrayBuffer:
@@ skipping 163 matching lines @@
     events.swap(m_scheduledEvents);
 
     Vector<RefPtr<Event> >::iterator it = events.begin();
     for (; it != events.end(); ++it)
         dispatchEvent((*it).release());
 
     events.clear();
 }
 
 } // namespace WebCore