Add constructors for WebAudio nodes

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

Index: third_party/WebKit/Source/modules/webaudio/DelayNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/DelayNode.cpp b/third_party/WebKit/Source/modules/webaudio/DelayNode.cpp
index 5e9a1414926b3d4ac3197607b31e7d1e82a15299..a99908cc86a43c89f4381ad5dd5e221e02d95011 100644
--- a/third_party/WebKit/Source/modules/webaudio/DelayNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/DelayNode.cpp
@@ -27,6 +27,7 @@
 #include "core/dom/ExceptionCode.h"
 #include "modules/webaudio/AudioBasicProcessorHandler.h"
 #include "modules/webaudio/DelayNode.h"
+#include "modules/webaudio/DelayOptions.h"
 #include "modules/webaudio/DelayProcessor.h"
 #include "wtf/MathExtras.h"
 #include "wtf/PtrUtil.h"
@@ -83,6 +84,22 @@ DelayNode* DelayNode::create(BaseAudioContext& context, double maxDelayTime, Exc
     return new DelayNode(context, maxDelayTime);
 }
 
+DelayNode* DelayNode::create(BaseAudioContext* context, const DelayOptions& options, ExceptionState& exceptionState)
+{
+    // maxDelayTime has a default value specified.
+    DelayNode* node = create(*context, options.maxDelayTime(), exceptionState);
+
+    if (!node)
+        return nullptr;
+
+    node->handleChannelOptions(options, exceptionState);
+
+    if (options.hasDelayTime())
+        node->delayTime()->setValue(options.delayTime());
+
+    return node;
+}
+
 AudioParam* DelayNode::delayTime()
 {
     return m_delayTime;