Add constructors for WebAudio nodes

third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp

Index: third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp b/third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp
index 7b7765e9544039323b1b4cc5f394dbb2222f19df..327fcb12f533a08de1a2c7a12a2c510e0a15ea2b 100644
--- a/third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp
@@ -25,6 +25,7 @@
 #include "modules/webaudio/BiquadFilterNode.h"
 
 #include "modules/webaudio/AudioBasicProcessorHandler.h"
+#include "modules/webaudio/BiquadFilterOptions.h"
 #include "platform/Histogram.h"
 #include "wtf/PtrUtil.h"
 
@@ -66,6 +67,29 @@ BiquadFilterNode* BiquadFilterNode::create(BaseAudioContext& context, ExceptionS
     return new BiquadFilterNode(context);
 }
 
+BiquadFilterNode* BiquadFilterNode::create(BaseAudioContext* context, const BiquadFilterOptions& options, ExceptionState& exceptionState)
+{
+    BiquadFilterNode* node = create(*context, exceptionState);
+
+    if (!node)
+        return nullptr;
+
+    node->handleChannelOptions(options, exceptionState);
+
+    if (options.hasType())
+        node->setType(options.type());
+    if (options.hasQ())
+        node->q()->setValue(options.Q());
+    if (options.hasDetune())
+        node->detune()->setValue(options.detune());
+    if (options.hasFrequency())
+        node->frequency()->setValue(options.frequency());
+    if (options.hasGain())
+        node->gain()->setValue(options.gain());
+
+    return node;
+}
+
 DEFINE_TRACE(BiquadFilterNode)
 {
     visitor->trace(m_frequency);