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

Source/modules/webaudio/DefaultAudioDestinationNode.cpp

 /*
  * Copyright (C) 2011, 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 100 matching lines @@
 
 void DefaultAudioDestinationNode::setChannelCount(unsigned long channelCount, ExceptionCode& ec)
 {
     // The channelCount for the input to this node controls the actual number of channels we
     // send to the audio hardware. It can only be set depending on the maximum number of
     // channels supported by the hardware.
 
     ASSERT(isMainThread());
 
     if (!maxChannelCount() || channelCount > maxChannelCount()) {
-        ec = INVALID_STATE_ERR;
+        ec = InvalidStateError;
         return;
     }
 
     unsigned long oldChannelCount = this->channelCount();
     AudioNode::setChannelCount(channelCount, ec);
 
     if (!ec && this->channelCount() != oldChannelCount && isInitialized()) {
         // Re-create destination.
         m_destination->stop();
         createDestination();
         m_destination->start();
     }
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)