Move the exception logic to the AudioNode creator

third_party/WebKit/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 21 matching lines @@
 namespace blink {
 
 WaveShaperNode::WaveShaperNode(AbstractAudioContext& context)
     : AudioNode(context)
 {
     setHandler(AudioBasicProcessorHandler::create(AudioHandler::NodeTypeWaveShaper, *this, context.sampleRate(), adoptPtr(new WaveShaperProcessor(context.sampleRate(), 1))));
 
     handler().initialize();
 }
 
+WaveShaperNode* WaveShaperNode::create(AbstractAudioContext& context, ExceptionState& exceptionState)
+{
+    DCHECK(isMainThread());
+
+    if (context.isContextClosed()) {
+        context.throwExceptionForClosedState(exceptionState);
+        return nullptr;
+    }
+
+    return new WaveShaperNode(context);
+}
+
 WaveShaperProcessor* WaveShaperNode::getWaveShaperProcessor() const
 {
     return static_cast<WaveShaperProcessor*>(static_cast<AudioBasicProcessorHandler&>(handler()).processor());
 }
 
 void WaveShaperNode::setCurve(DOMFloat32Array* curve, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
 
     if (curve && curve->length() < 2) {
@@ skipping 44 matching lines @@
     case WaveShaperProcessor::OverSample4x:
         return "4x";
     default:
         ASSERT_NOT_REACHED();
         return "none";
     }
 }
 
 } // namespace blink