Take advantage of the new Pass() machinery on scoped_ptr{,_malloc}.

media/filters/audio_renderer_algorithm_base.h

Index: media/filters/audio_renderer_algorithm_base.h
diff --git a/media/filters/audio_renderer_algorithm_base.h b/media/filters/audio_renderer_algorithm_base.h
index 6ea8db59f7a060af8d68f243eb50fe890ff2429d..c1aa4af96cca1d9b6e72d3336003649a444aea3a 100644
--- a/media/filters/audio_renderer_algorithm_base.h
+++ b/media/filters/audio_renderer_algorithm_base.h
@@ -39,12 +39,10 @@ class MEDIA_EXPORT AudioRendererAlgorithmBase {
   AudioRendererAlgorithmBase();
   ~AudioRendererAlgorithmBase();
 
-  // Checks validity of audio parameters and takes ownership of |callback|.
-  void Initialize(int channels,
-                          int sample_rate,
-                          int sample_bits,
-                          float initial_playback_rate,
-                          const base::Closure& callback);
+  // Checks validity of audio parameters.
+  void Initialize(
+      int channels, int sample_rate, int sample_bits,
+      float initial_playback_rate, const base::Closure& callback);
 
   // Tries to fill |length| bytes of |dest| with possibly scaled data from
   // our |queue_|. Returns the number of bytes copied into |dest|.