Rename ExceptionCode constants to use the names in the spec (2/3)

Source/modules/mediastream/RTCDTMFSender.cpp

 /*
  * Copyright (C) 2013 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 88 matching lines @@
 }
 
 void RTCDTMFSender::insertDTMF(const String& tones, long duration, long interToneGap, ExceptionCode& ec)
 {
     if (!canInsertDTMF()) {
         ec = NotSupportedError;
         return;
     }
 
     if (duration > maxToneDurationMs || duration < minToneDurationMs) {
-        ec = SYNTAX_ERR;
+        ec = SyntaxError;
         return;
     }
 
     if (interToneGap < minInterToneGapMs) {
-        ec = SYNTAX_ERR;
+        ec = SyntaxError;
         return;
     }
 
     m_duration = duration;
     m_interToneGap = interToneGap;
 
     if (!m_handler->insertDTMF(tones, m_duration, m_interToneGap))
-        ec = SYNTAX_ERR;
+        ec = SyntaxError;
 }
 
 void RTCDTMFSender::didPlayTone(const String& tone)
 {
     scheduleDispatchEvent(RTCDTMFToneChangeEvent::create(tone));
 }
 
 const AtomicString& RTCDTMFSender::interfaceName() const
 {
     return eventNames().interfaceForRTCDTMFSender;
@@ skipping 35 matching lines @@
 
     Vector<RefPtr<Event> > events;
     events.swap(m_scheduledEvents);
 
     Vector<RefPtr<Event> >::iterator it = events.begin();
     for (; it != events.end(); ++it)
         dispatchEvent((*it).release());
 }
 
 } // namespace WebCore