Makes AudioOutputDispatcher non-ref-counted.

media/audio/audio_output_proxy.h

Index: media/audio/audio_output_proxy.h
diff --git a/media/audio/audio_output_proxy.h b/media/audio/audio_output_proxy.h
index 8a5aab09f1559d754f2f152a958e2543cc34f4e7..0b358087348f307db5c98da281417a7048e66d1c 100644
--- a/media/audio/audio_output_proxy.h
+++ b/media/audio/audio_output_proxy.h
@@ -7,7 +7,6 @@
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/ref_counted.h"
 #include "base/threading/non_thread_safe.h"
 #include "media/audio/audio_io.h"
 #include "media/base/audio_parameters.h"
@@ -40,7 +39,7 @@ class MEDIA_EXPORT AudioOutputProxy
   void Close() override;
 
   AudioOutputDispatcher* get_dispatcher_for_testing() const {
-    return dispatcher_.get();
+    return dispatcher_;
   }
 
  private:
@@ -55,7 +54,7 @@ class MEDIA_EXPORT AudioOutputProxy
 
   ~AudioOutputProxy() override;
 
-  scoped_refptr<AudioOutputDispatcher> dispatcher_;
+  AudioOutputDispatcher* dispatcher_;
   State state_;
 
   // Need to save volume here, so that we can restore it in case the stream