make pulseaudio available for all posix platforms because it's not linux only

media/audio/openbsd/audio_manager_openbsd.h

Index: media/audio/openbsd/audio_manager_openbsd.h
diff --git a/media/audio/openbsd/audio_manager_openbsd.h b/media/audio/openbsd/audio_manager_openbsd.h
index b9f19c6e85f9cab0fcc4ab3f0565d94c93659dc2..e768524d9402920e12114a193090d6b8c24ffc2b 100644
--- a/media/audio/openbsd/audio_manager_openbsd.h
+++ b/media/audio/openbsd/audio_manager_openbsd.h
@@ -5,27 +5,37 @@
 #ifndef MEDIA_AUDIO_OPENBSD_AUDIO_MANAGER_OPENBSD_H_
 #define MEDIA_AUDIO_OPENBSD_AUDIO_MANAGER_OPENBSD_H_
 
-#include "base/basictypes.h"
+#include <set>
+
+#include "base/compiler_specific.h"
 #include "media/audio/audio_manager_base.h"
 
-class AudioManagerOpenBSD : public AudioManagerBase {
+class MEDIA_EXPORT AudioManagerOpenBSD : public AudioManagerBase {
  public:
   AudioManagerOpenBSD();
 
+  // Call before using a newly created AudioManagerOpenBSD instance.
+  virtual void Init() OVERRIDE;
+
   // Implementation of AudioManager.
   virtual bool HasAudioOutputDevices() OVERRIDE;
   virtual bool HasAudioInputDevices() OVERRIDE;
   virtual AudioOutputStream* MakeAudioOutputStream(
       const AudioParameters& params) OVERRIDE;
-  virtual AudioInputStream* MakeAudioInputStream(
-      const AudioParameters& params) OVERRIDE;
-  virtual bool IsRecordingInProgress() OVERRIDE;
+  virtual AudioInputStream* MakeAudioInputStream(const AudioParameters& params)
+      OVERRIDE;
+
   virtual void MuteAll() OVERRIDE;
   virtual void UnMuteAll() OVERRIDE;
 
- private:
+  virtual void ReleaseOutputStream(AudioOutputStream* stream);
+
+ protected:
   virtual ~AudioManagerOpenBSD();
 
+ private:
+  std::set<AudioOutputStream*> active_streams_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioManagerOpenBSD);
 };