Implement AudioOutputProxy.

media/audio/audio_manager_base.h

Index: media/audio/audio_manager_base.h
diff --git a/media/audio/audio_manager_base.h b/media/audio/audio_manager_base.h
index 6d01c26892e02f1a3d1eed415c34d3bede608525..bf90bb8939c906841d535b317ec851ef01035200 100644
--- a/media/audio/audio_manager_base.h
+++ b/media/audio/audio_manager_base.h
@@ -5,9 +5,13 @@
 #ifndef MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_
 #define MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_
 
+#include <map>
+
 #include "base/thread.h"
 #include "media/audio/audio_manager.h"
 
+class AudioOutputDispatcher;
+
 // AudioManagerBase provides AudioManager functions common for all platforms.
 class AudioManagerBase : public AudioManager {
  public:
@@ -17,8 +21,19 @@ class AudioManagerBase : public AudioManager {
 
   virtual MessageLoop* GetMessageLoop();
 
+  virtual AudioOutputStream* MakeAudioOutputStreamProxy(
+      AudioParameters params);
+
  protected:
-  virtual ~AudioManagerBase() {}
+  virtual ~AudioManagerBase();
+
+  class CompareAudioParams {
+   public:
+    bool operator()(const AudioParameters& a, const AudioParameters& b) const;
+  };
+  typedef std::map<AudioParameters, scoped_refptr<AudioOutputDispatcher>,
+                   CompareAudioParams>
+      AudioOutputDispatchersMap;
 
   bool initialized() { return initialized_; }
 
@@ -28,6 +43,8 @@ class AudioManagerBase : public AudioManager {
 
   bool initialized_;
 
+  AudioOutputDispatchersMap output_dispatchers_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioManagerBase);
 };