Require use of AudioBus::create() to avoid ref-counting issues

Source/modules/webaudio/MediaStreamAudioDestinationNode.cpp

Index: Source/modules/webaudio/MediaStreamAudioDestinationNode.cpp
diff --git a/Source/modules/webaudio/MediaStreamAudioDestinationNode.cpp b/Source/modules/webaudio/MediaStreamAudioDestinationNode.cpp
index 8c82673239abdaf3a541ab179952b4cdadfc83fb..329fbe22e985abbcef8168a919f1b1a16887c1a8 100644
--- a/Source/modules/webaudio/MediaStreamAudioDestinationNode.cpp
+++ b/Source/modules/webaudio/MediaStreamAudioDestinationNode.cpp
@@ -45,7 +45,7 @@ PassRefPtr<MediaStreamAudioDestinationNode> MediaStreamAudioDestinationNode::cre
 
 MediaStreamAudioDestinationNode::MediaStreamAudioDestinationNode(AudioContext* context, size_t numberOfChannels)
     : AudioBasicInspectorNode(context, context->sampleRate(), numberOfChannels)
-    , m_mixBus(numberOfChannels, ProcessingSizeInFrames)
+    , m_mixBus(new AudioBus(numberOfChannels, ProcessingSizeInFrames))

[Chris Rogers, 2013/05/02 17:48:46]

adoptRef()

 {
     setNodeType(NodeTypeMediaStreamAudioDestination);
 
@@ -73,8 +73,8 @@ MediaStreamAudioDestinationNode::~MediaStreamAudioDestinationNode()
 
 void MediaStreamAudioDestinationNode::process(size_t numberOfFrames)
 {
-    m_mixBus.copyFrom(*input(0)->bus());
-    m_source->consumeAudio(&m_mixBus, numberOfFrames);
+    m_mixBus->copyFrom(*input(0)->bus());
+    m_source->consumeAudio(m_mixBus.get(), numberOfFrames);
 }
 
 void MediaStreamAudioDestinationNode::reset()