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

Source/core/platform/audio/AudioResampler.cpp

Index: Source/core/platform/audio/AudioResampler.cpp
diff --git a/Source/core/platform/audio/AudioResampler.cpp b/Source/core/platform/audio/AudioResampler.cpp
index 7b5dd9f875049982ceda2ce943cd54f1fdc4af9f..faeecae1bbfbca8b167d9918e6203c24c0b0abe2 100644
--- a/Source/core/platform/audio/AudioResampler.cpp
+++ b/Source/core/platform/audio/AudioResampler.cpp
@@ -42,7 +42,7 @@ AudioResampler::AudioResampler()
     : m_rate(1.0)
 {
     m_kernels.append(adoptPtr(new AudioResamplerKernel(this)));
-    m_sourceBus = adoptRef(new AudioBus(1, 0, false));
+    m_sourceBus = AudioBus::create(1, 0, false);
 }
 
 AudioResampler::AudioResampler(unsigned numberOfChannels)
@@ -51,7 +51,7 @@ AudioResampler::AudioResampler(unsigned numberOfChannels)
     for (unsigned i = 0; i < numberOfChannels; ++i)
         m_kernels.append(adoptPtr(new AudioResamplerKernel(this)));
 
-    m_sourceBus = adoptRef(new AudioBus(numberOfChannels, 0, false));
+    m_sourceBus = AudioBus::create(numberOfChannels, 0, false);
 }
 
 void AudioResampler::configureChannels(unsigned numberOfChannels)
@@ -68,7 +68,7 @@ void AudioResampler::configureChannels(unsigned numberOfChannels)
         m_kernels.resize(numberOfChannels);
 
     // Reconfigure our source bus to the new channel size.
-    m_sourceBus = adoptRef(new AudioBus(numberOfChannels, 0, false));
+    m_sourceBus = AudioBus::create(numberOfChannels, 0, false);
 }
 
 void AudioResampler::process(AudioSourceProvider* provider, AudioBus* destinationBus, size_t framesToProcess)