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

Source/core/platform/audio/MultiChannelResampler.cpp

 /*
  * Copyright (C) 2011 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 46 matching lines @@
     {
         bool isBusGood = bus && bus->numberOfChannels() == 1;
         ASSERT(isBusGood);
         if (!isBusGood)
             return;
 
         // Get the data from the multi-channel provider when the first channel asks for it.
         // For subsequent channels, we can just dish out the channel data from that (stored in m_multiChannelBus).
         if (!m_currentChannel) {
             m_framesToProcess = framesToProcess;
-            m_multiChannelBus = adoptRef(new AudioBus(m_numberOfChannels, framesToProcess));
+            m_multiChannelBus = AudioBus::create(m_numberOfChannels, framesToProcess);
             m_multiChannelProvider->provideInput(m_multiChannelBus.get(), framesToProcess);
         }
 
         // All channels must ask for the same amount. This should always be the case, but let's just make sure.
         bool isGood = m_multiChannelBus.get() && framesToProcess == m_framesToProcess;
         ASSERT(isGood);
         if (!isGood)
             return;
 
         // Copy the channel data from what we received from m_multiChannelProvider.
@@ skipping 36 matching lines @@
         // channels, since they all buffer in the same way and are processing the same number of frames.
         m_kernels[channelIndex]->process(&channelProvider,
                                          destination->channel(channelIndex)->mutableData(),
                                          framesToProcess);
     }
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)