Add constructors for WebAudio nodes

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 16 matching lines @@
  */
 
 #include "modules/webaudio/ChannelMergerNode.h"
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
 #include "modules/webaudio/AudioNodeInput.h"
 #include "modules/webaudio/AudioNodeOutput.h"
 #include "modules/webaudio/BaseAudioContext.h"
+#include "modules/webaudio/ChannelMergerOptions.h"
 
 
 namespace blink {
 
 ChannelMergerHandler::ChannelMergerHandler(AudioNode& node, float sampleRate, unsigned numberOfInputs)
     : AudioHandler(NodeTypeChannelMerger, node, sampleRate)
 {
     // These properties are fixed for the node and cannot be changed by user.
     m_channelCount = 1;
     setInternalChannelCountMode(Explicit);
@@ skipping 104 matching lines @@
                 1,
                 ExceptionMessages::InclusiveBound,
                 BaseAudioContext::maxNumberOfChannels(),
                 ExceptionMessages::InclusiveBound));
         return nullptr;
     }
 
     return new ChannelMergerNode(context, numberOfInputs);
 }
 
+ChannelMergerNode* ChannelMergerNode::create(BaseAudioContext* context, const ChannelMergerOptions& options, ExceptionState& exceptionState)
+{
+    ChannelMergerNode* node = create(*context, options.numberOfInputs(), exceptionState);
+
+    if (!node)
+        return nullptr;
+
+    node->handleChannelOptions(options, exceptionState);
+
+    return node;
+}
+
 } // namespace blink