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

Source/modules/webaudio/AudioNodeInput.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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 24 matching lines @@
 
 using namespace std;
  
 namespace WebCore {
 
 AudioNodeInput::AudioNodeInput(AudioNode* node)
     : AudioSummingJunction(node->context())
     , m_node(node)
 {
     // Set to mono by default.
-    m_internalSummingBus = adoptRef(new AudioBus(1, AudioNode::ProcessingSizeInFrames));
+    m_internalSummingBus = AudioBus::create(1, AudioNode::ProcessingSizeInFrames);
 }
 
 void AudioNodeInput::connect(AudioNodeOutput* output)
 {
     ASSERT(context()->isGraphOwner());
     
     ASSERT(output && node());
     if (!output || !node())
         return;
 
@@ skipping 81 matching lines @@
 
 void AudioNodeInput::updateInternalBus()
 {
     ASSERT(context()->isAudioThread() && context()->isGraphOwner());
 
     unsigned numberOfInputChannels = numberOfChannels();
 
     if (numberOfInputChannels == m_internalSummingBus->numberOfChannels())
         return;
 
-    m_internalSummingBus = adoptRef(new AudioBus(numberOfInputChannels, AudioNode::ProcessingSizeInFrames));
+    m_internalSummingBus = AudioBus::create(numberOfInputChannels, AudioNode::ProcessingSizeInFrames);
 }
 
 unsigned AudioNodeInput::numberOfChannels() const
 {
     AudioNode::ChannelCountMode mode = node()->internalChannelCountMode();
     if (mode == AudioNode::Explicit)
         return node()->channelCount();
 
     // Find the number of channels of the connection with the largest number of channels.
     unsigned maxChannels = 1; // one channel is the minimum allowed
@@ skipping 79 matching lines @@
 
     // Handle multiple connections case.
     sumAllConnections(internalSummingBus, framesToProcess);
     
     return internalSummingBus;
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)