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

media/audio/pulse/pulse_output.h

Index: media/audio/pulse/pulse_output.h
diff --git a/media/audio/linux/pulse_output.h b/media/audio/pulse/pulse_output.h
similarity index 93%
rename from media/audio/linux/pulse_output.h
rename to media/audio/pulse/pulse_output.h
index 46aab578ff15b799cbfa67d685785befa51fa97c..c01af18fe7e3e6e6b59dd30bcfe4c0b2d82215ad 100644
--- a/media/audio/linux/pulse_output.h
+++ b/media/audio/pulse/pulse_output.h
@@ -31,14 +31,23 @@ namespace media {
 class SeekableBuffer;
 }
 
+#if defined(OS_LINUX)
 class AudioManagerLinux;
+typedef AudioManagerLinux AudioManagerPulse;
+#elif defined(OS_OPENBSD)
+class AudioManagerOpenBSD;
+typedef AudioManagerOpenBSD AudioManagerPulse;
+#else
+#error Unsupported platform
+#endif
+
 struct AudioParameters;
 class MessageLoop;
 
 class PulseAudioOutputStream : public AudioOutputStream {
  public:
   PulseAudioOutputStream(const AudioParameters& params,
-                         AudioManagerLinux* manager,
+                         AudioManagerPulse* manager,
                          MessageLoop* message_loop);
 
   virtual ~PulseAudioOutputStream();
@@ -86,7 +95,7 @@ class PulseAudioOutputStream : public AudioOutputStream {
   const uint32 bytes_per_frame_;
 
   // Audio manager that created us.  Used to report that we've closed.
-  AudioManagerLinux* manager_;
+  AudioManagerPulse* manager_;
 
   // PulseAudio API structs.
   pa_context* pa_context_;