Revert "Pull AudioDestinationConsumer off the Blink GC heap."

third_party/WebKit/Source/platform/audio/AudioDestinationConsumer.h

Index: third_party/WebKit/Source/platform/audio/AudioDestinationConsumer.h
diff --git a/third_party/WebKit/Source/platform/audio/AudioDestinationConsumer.h b/third_party/WebKit/Source/platform/audio/AudioDestinationConsumer.h
index 849fef2d9cc9fbe79a0ae6f52bcf15520b9e1887..99c2b5fe823d574c3122adac9d607d4033567375 100644
--- a/third_party/WebKit/Source/platform/audio/AudioDestinationConsumer.h
+++ b/third_party/WebKit/Source/platform/audio/AudioDestinationConsumer.h
@@ -31,17 +31,20 @@
 #ifndef AudioDestinationConsumer_h
 #define AudioDestinationConsumer_h
 
-#include <memory>
 #include "platform/PlatformExport.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
 
 class AudioBus;
 
-class PLATFORM_EXPORT AudioDestinationConsumer {
+class PLATFORM_EXPORT AudioDestinationConsumer
+    : public GarbageCollected<AudioDestinationConsumer> {
  public:
   virtual void setFormat(size_t numberOfChannels, float sampleRate) = 0;
   virtual void consumeAudio(AudioBus*, size_t numberOfFrames) = 0;
+
+  DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
 
 }  // namespace blink