Fold AudioRenderer::Stop() into the dtor.

media/base/audio_renderer.h

Index: media/base/audio_renderer.h
diff --git a/media/base/audio_renderer.h b/media/base/audio_renderer.h
index dc202be9a2dc68a641ae569edfdc0288eaf53e07..3e7131c683b9c0ba55853b66fcda09a401090cf8 100644
--- a/media/base/audio_renderer.h
+++ b/media/base/audio_renderer.h
@@ -23,6 +23,8 @@ class MEDIA_EXPORT AudioRenderer {
   typedef base::Callback<void(base::TimeDelta, base::TimeDelta)> TimeCB;
 
   AudioRenderer();
+
+  // Stop all operations and fire all pending callbacks.
   virtual ~AudioRenderer();
 
   // Initialize an AudioRenderer with |stream|, executing |init_cb| upon
@@ -60,10 +62,6 @@ class MEDIA_EXPORT AudioRenderer {
   // Only valid to call after a successful Initialize() or Flush().
   virtual void StartPlaying() = 0;
 
-  // Stop all operations in preparation for being deleted, executing |callback|
-  // when complete.
-  virtual void Stop(const base::Closure& callback) = 0;
-
   // Sets the output volume.
   virtual void SetVolume(float volume) = 0;