Decouple 'give me more data' and 'rendered end of stream' audio callbacks.

media/filters/audio_renderer_base.h

Index: media/filters/audio_renderer_base.h
===================================================================
--- media/filters/audio_renderer_base.h	(revision 120523)
+++ media/filters/audio_renderer_base.h	(working copy)
@@ -21,6 +21,7 @@
 
 #include <deque>
 
+#include "base/gtest_prod_util.h"
 #include "base/synchronization/lock.h"
 #include "media/base/buffers.h"
 #include "media/base/filters.h"
@@ -51,6 +52,7 @@
  protected:
   FRIEND_TEST_ALL_PREFIXES(AudioRendererBaseTest, EndOfStream);
   FRIEND_TEST_ALL_PREFIXES(AudioRendererBaseTest, Underflow_EndOfStream);
+  FRIEND_TEST_ALL_PREFIXES(AudioRendererImplTest, OnRenderEndOfStream);
 
   // Subclasses should return true if they were able to initialize, false
   // otherwise.
@@ -98,13 +100,19 @@
                     const base::TimeDelta& playback_delay);
 
   // Called by OnRenderEndOfStream() or some callback scheduled by derived class
-  // to signal end of stream.
-  void SignalEndOfStream();
+  // to signal end of stream. Made virtual so tests can override.
+  virtual void SignalEndOfStream();
 
   // Get/Set the playback rate of |algorithm_|.
   virtual void SetPlaybackRate(float playback_rate) OVERRIDE;
   virtual float GetPlaybackRate();
 
+  // Accessor used by tests. Made protected, not private,
+  // so tests for derived classes can use it.
+  void set_recieved_end_of_stream(bool recieved_end_of_stream) {
+    recieved_end_of_stream_ = recieved_end_of_stream;
+  }
+
  private:
   friend class AudioRendererBaseTest;