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

Source/core/platform/audio/MultiChannelResampler.cpp

Index: Source/core/platform/audio/MultiChannelResampler.cpp
diff --git a/Source/core/platform/audio/MultiChannelResampler.cpp b/Source/core/platform/audio/MultiChannelResampler.cpp
index 806a9e09c153a08d8b05c8e5887377b0496b3f94..4bd742fde1ea6b0e437c8aaef9051088be51f1b7 100644
--- a/Source/core/platform/audio/MultiChannelResampler.cpp
+++ b/Source/core/platform/audio/MultiChannelResampler.cpp
@@ -64,7 +64,7 @@ public:
         // 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);
         }