Drop redundant 'ExceptionMessages::failedToXXX' calls.

Source/modules/webaudio/WaveShaperNode.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 56 matching lines @@
 
     if (type == "none") {
         waveShaperProcessor()->setOversample(WaveShaperProcessor::OverSampleNone);
     } else if (type == "2x") {
         waveShaperProcessor()->setOversample(WaveShaperProcessor::OverSample2x);
     } else if (type == "4x") {
         waveShaperProcessor()->setOversample(WaveShaperProcessor::OverSample4x);
     } else {
         exceptionState.throwDOMException(
             InvalidStateError,
-            ExceptionMessages::failedToSet(
-                "oversample",
-                "WaveShaperNode",
-                "invalid oversample '" + type + "': must be 'none', '2x', or '4x'."));
+            "The value provided ('" + type + "') is not one of 'none', '2x', or '4x'.");
     }
 }
 
 String WaveShaperNode::oversample() const
 {
     switch (const_cast<WaveShaperNode*>(this)->waveShaperProcessor()->oversample()) {
     case WaveShaperProcessor::OverSampleNone:
         return "none";
     case WaveShaperProcessor::OverSample2x:
         return "2x";
     case WaveShaperProcessor::OverSample4x:
         return "4x";
     default:
         ASSERT_NOT_REACHED();
         return "none";
     }
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)