Add constructors for WebAudio nodes

third_party/WebKit/Source/modules/webaudio/IIRFilterNode.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IIRFilterNode_h
 #define IIRFilterNode_h
 
 #include "core/dom/DOMTypedArray.h"
 #include "modules/webaudio/AudioNode.h"
 #include "modules/webaudio/IIRProcessor.h"
 
 namespace blink {
 
 class BaseAudioContext;
 class ExceptionState;
+class IIRFilterOptions;
 
 class IIRFilterNode : public AudioNode {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static IIRFilterNode* create(
         BaseAudioContext&,
         const Vector<double> feedforward,
         const Vector<double> feedback,
         ExceptionState&);
 
+    static IIRFilterNode* create(BaseAudioContext*, const IIRFilterOptions&, ExceptionState&);
+
     DECLARE_VIRTUAL_TRACE();
 
     // Get the magnitude and phase response of the filter at the given
     // set of frequencies (in Hz). The phase response is in radians.
     void getFrequencyResponse(const DOMFloat32Array* frequencyHz, DOMFloat32Array* magResponse, DOMFloat32Array* phaseResponse, ExceptionState&);
 
 private:
     IIRFilterNode(BaseAudioContext&, const Vector<double> denominator, const Vector<double> numerator);
 
     IIRProcessor* iirProcessor() const;
 };
 
 } // namespace blink
 
 #endif // IIRFilterNode_h