Ensures that audio tasks cannot run after AudioManager is deleted.

media/audio/pulse/pulse_util.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_AUDIO_PULSE_PULSE_UTIL_H_
 #define MEDIA_AUDIO_PULSE_PULSE_UTIL_H_
 
 #include <pulse/pulseaudio.h>
 
 #include <string>
@@ skipping 19 matching lines @@
 
   ~AutoPulseLock() {
     pa_threaded_mainloop_unlock(pa_mainloop_);
   }
 
  private:
   pa_threaded_mainloop* pa_mainloop_;
   DISALLOW_COPY_AND_ASSIGN(AutoPulseLock);
 };
 
+bool MEDIA_EXPORT InitPulse(pa_threaded_mainloop** mainloop,
+                            pa_context** context);
+void DestroyPulse(pa_threaded_mainloop* mainloop, pa_context* context);
+
 // Triggers pa_threaded_mainloop_signal() to avoid deadlocks.
 void StreamSuccessCallback(pa_stream* s, int error, void* mainloop);
 void ContextStateCallback(pa_context* context, void* mainloop);
 
 pa_sample_format_t BitsToPASampleFormat(int bits_per_sample);
 
 pa_channel_map ChannelLayoutToPAChannelMap(ChannelLayout channel_layout);
 
 void WaitForOperationCompletion(pa_threaded_mainloop* mainloop,
                                 pa_operation* operation);
@@ skipping 28 matching lines @@
                         const std::string& app_name,
                         pa_stream_notify_cb_t stream_callback,
                         pa_stream_request_cb_t write_callback,
                         void* user_data);
 
 }  // namespace pulse
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_PULSE_PULSE_UTIL_H_