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

Source/core/platform/audio/Reverb.cpp

Index: Source/core/platform/audio/Reverb.cpp
diff --git a/Source/core/platform/audio/Reverb.cpp b/Source/core/platform/audio/Reverb.cpp
index 1c23082b01d179e2e1348246fb74a6d1d87897c1..0a934ad7c0e0b2030ee6b4862bbcb371780b3a1d 100644
--- a/Source/core/platform/audio/Reverb.cpp
+++ b/Source/core/platform/audio/Reverb.cpp
@@ -132,7 +132,7 @@ void Reverb::initialize(AudioBus* impulseResponseBuffer, size_t renderSliceSize,
     // For "True" stereo processing we allocate a temporary buffer to avoid repeatedly allocating it in the process() method.
     // It can be bad to allocate memory in a real-time thread.
     if (numResponseChannels == 4)
-        m_tempBuffer = adoptRef(new AudioBus(2, MaxFrameSize));
+        m_tempBuffer = AudioBus::create(2, MaxFrameSize);
 }
 
 void Reverb::process(const AudioBus* sourceBus, AudioBus* destinationBus, size_t framesToProcess)