Implement IIRFilter node for WebAudio.

third_party/WebKit/Source/modules/webaudio/AudioContext.idl

Index: third_party/WebKit/Source/modules/webaudio/AudioContext.idl
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioContext.idl b/third_party/WebKit/Source/modules/webaudio/AudioContext.idl
index e7f4e6d12cee509454d1dadae2545cb2a53b55c1..32ea81a3d9222d88974da455ae8d9023776437a6 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioContext.idl
+++ b/third_party/WebKit/Source/modules/webaudio/AudioContext.idl
@@ -70,6 +70,7 @@ enum AudioContextState {
     [RaisesException, MeasureAs=AudioContextCreateGain] GainNode createGain();
     [RaisesException, MeasureAs=AudioContextCreateDelay] DelayNode createDelay(optional double maxDelayTime);
     [RaisesException, MeasureAs=AudioContextCreateBiquadFilter] BiquadFilterNode createBiquadFilter();
+    [RaisesException, MeasureAs=AudioContextCreateIIRFilter] IIRFilterNode createIIRFilter(sequence<double> feedForward, sequence<double> feedBack);
     [RaisesException, MeasureAs=AudioContextCreateWaveShaper] WaveShaperNode createWaveShaper();
     [RaisesException, MeasureAs=AudioContextCreatePanner] PannerNode createPanner();
     [RaisesException, MeasureAs=AudioContextCreateConvolver] ConvolverNode createConvolver();
@@ -93,3 +94,4 @@ enum AudioContextState {
 
     attribute EventHandler onstatechange;
 };
+

[tkent, 2016/01/13 03:28:28]

nit: This line is unnecessary.

[Raymond Toy, 2016/01/13 18:30:53]

Done.