Adds volume level measurements to the AudioInputController for low-latency clients

media/audio/pulse/pulse_input.h

Index: media/audio/pulse/pulse_input.h
diff --git a/media/audio/pulse/pulse_input.h b/media/audio/pulse/pulse_input.h
index 7566eacf10ba297b51798009e91ac59291da1693..0aee9947100cd32c2015113e52ba1d698848a19f 100644
--- a/media/audio/pulse/pulse_input.h
+++ b/media/audio/pulse/pulse_input.h
@@ -12,6 +12,7 @@
 #include "media/audio/audio_device_name.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
+#include "media/audio/audio_power_monitor.h"
 
 struct pa_context;
 struct pa_source_info;
@@ -77,6 +78,8 @@ class PulseAudioInputStream : public AgcAudioStream<AudioInputStream> {
 
   base::ThreadChecker thread_checker_;
 
+  AudioPowerMonitor audio_level_monitor_;
+
   DISALLOW_COPY_AND_ASSIGN(PulseAudioInputStream);
 };