Move some generic functions to AudioManagerBase to be inherited by platform-specific AudioManager***

media/audio/win/audio_manager_win.h

Index: media/audio/win/audio_manager_win.h
diff --git a/media/audio/win/audio_manager_win.h b/media/audio/win/audio_manager_win.h
index dd41699ada50373b0bb0e64fe345b0703ff1d039..3539ef02499d18f08aa19b54908ab4455e7dafec 100644
--- a/media/audio/win/audio_manager_win.h
+++ b/media/audio/win/audio_manager_win.h
@@ -22,10 +22,6 @@ class MEDIA_EXPORT AudioManagerWin : public AudioManagerBase {
   // Implementation of AudioManager.
   virtual bool HasAudioOutputDevices() OVERRIDE;
   virtual bool HasAudioInputDevices() OVERRIDE;
-  virtual AudioOutputStream* MakeAudioOutputStream(
-      const AudioParameters& params) OVERRIDE;
-  virtual AudioInputStream* MakeAudioInputStream(
-      const AudioParameters& params, const std::string& device_id) OVERRIDE;
   virtual void MuteAll() OVERRIDE;
   virtual void UnMuteAll() OVERRIDE;
   virtual string16 GetAudioInputDeviceModel() OVERRIDE;
@@ -34,12 +30,15 @@ class MEDIA_EXPORT AudioManagerWin : public AudioManagerBase {
   virtual void GetAudioInputDeviceNames(media::AudioDeviceNames* device_names)
       OVERRIDE;
 
-  // Windows-only methods to free a stream created in MakeAudioStream. These
-  // are called internally by the audio stream when it has been closed.
-  void ReleaseOutputStream(AudioOutputStream* stream);
-
-  // Called internally by the audio stream when it has been closed.
-  void ReleaseInputStream(AudioInputStream* stream);
+  // Implementation of AudioManagerBase.
+  virtual AudioOutputStream* MakeLinearOutputStream(
+      const AudioParameters& params) OVERRIDE;
+  virtual AudioOutputStream* MakeLowLatencyOutputStream(
+      const AudioParameters& params) OVERRIDE;
+  virtual AudioInputStream* MakeLinearInputStream(
+      const AudioParameters& params, const std::string& device_id) OVERRIDE;
+  virtual AudioInputStream* MakeLowLatencyInputStream(
+      const AudioParameters& params, const std::string& device_id) OVERRIDE;
 
  protected:
   virtual ~AudioManagerWin();
@@ -60,9 +59,6 @@ class MEDIA_EXPORT AudioManagerWin : public AudioManagerBase {
     enumeration_type_ = type;
   }
 
-  // Number of currently open output streams.
-  int num_output_streams_;
-
   DISALLOW_COPY_AND_ASSIGN(AudioManagerWin);
 };