Add constructors for WebAudio nodes

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

Index: third_party/WebKit/Source/modules/webaudio/ConvolverNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/ConvolverNode.cpp b/third_party/WebKit/Source/modules/webaudio/ConvolverNode.cpp
index 70054e847f5591d88ca46530f79bbe8d215b3083..9c52399a5141620a9dac21c758055eb0765f25c4 100644
--- a/third_party/WebKit/Source/modules/webaudio/ConvolverNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/ConvolverNode.cpp
@@ -28,6 +28,7 @@
 #include "modules/webaudio/AudioNodeInput.h"
 #include "modules/webaudio/AudioNodeOutput.h"
 #include "modules/webaudio/ConvolverNode.h"
+#include "modules/webaudio/ConvolverOptions.h"
 #include "platform/audio/Reverb.h"
 #include "wtf/PtrUtil.h"
 #include <memory>
@@ -185,6 +186,23 @@ ConvolverNode* ConvolverNode::create(BaseAudioContext& context, ExceptionState&
     return new ConvolverNode(context);
 }
 
+ConvolverNode* ConvolverNode::create(BaseAudioContext* context, const ConvolverOptions& options, ExceptionState& exceptionState)
+{
+    ConvolverNode* node = create(*context, exceptionState);
+
+    if (!node)
+        return nullptr;
+
+    node->handleChannelOptions(options, exceptionState);
+
+    // It is important to set normalize first because setting the buffer will
+    // examing the normalize attribute to see if normalization needs to be done.
+    node->setNormalize(!options.disableNormalization());
+    if (options.hasBuffer())
+        node->setBuffer(options.buffer(), exceptionState);
+    return node;
+}
+
 ConvolverHandler& ConvolverNode::convolverHandler() const
 {
     return static_cast<ConvolverHandler&>(handler());