Rewrote UpdateToMix in the audio mixer.

webrtc/modules/audio_mixer/source/new_audio_conference_mixer_impl.h

Index: webrtc/modules/audio_mixer/source/new_audio_conference_mixer_impl.h
diff --git a/webrtc/modules/audio_mixer/source/new_audio_conference_mixer_impl.h b/webrtc/modules/audio_mixer/source/new_audio_conference_mixer_impl.h
index 8491ce6d0c3bdfbb3da64c80aa2f900f807c422e..d5f037b0a7c09441109cade5364c50e828d8b616 100644
--- a/webrtc/modules/audio_mixer/source/new_audio_conference_mixer_impl.h
+++ b/webrtc/modules/audio_mixer/source/new_audio_conference_mixer_impl.h
@@ -84,17 +84,10 @@ class NewAudioConferenceMixerImpl : public NewAudioConferenceMixer {
   int32_t SetOutputFrequency(const Frequency& frequency);
   Frequency OutputFrequency() const;
 
-  // Fills mixList with the AudioFrames pointers that should be used when
-  // mixing.
-  // maxAudioFrameCounter both input and output specifies how many more
-  // AudioFrames that are allowed to be mixed.
-  // rampOutList contain AudioFrames corresponding to an audio stream that
-  // used to be mixed but shouldn't be mixed any longer. These AudioFrames
-  // should be ramped out over this AudioFrame to avoid audio discontinuities.
-  void UpdateToMix(AudioFrameList* mixList,
-                   AudioFrameList* rampOutList,
-                   std::map<int, MixerAudioSource*>* mixParticipantList,
-                   size_t* maxAudioFrameCounter) const;
+  // Compute what participants to mix from _participantList. Ramp in
+  // and out. Update mixed status. maxAudioFrameCounter specifies how
+  // many participants are allowed to be mixed.
+  AudioFrameList UpdateToMix(size_t maxAudioFrameCounter) const;
 
   // Return the lowest mixing frequency that can be used without having to
   // downsample any audio.
@@ -105,11 +98,6 @@ class NewAudioConferenceMixerImpl : public NewAudioConferenceMixer {
   // Return the AudioFrames that should be mixed anonymously.
   void GetAdditionalAudio(AudioFrameList* additionalFramesList) const;
 
-  // Update the NewMixHistory of all MixerAudioSources. mixedParticipantsList
-  // should contain a map of MixerAudioSources that have been mixed.
-  void UpdateMixedStatus(
-      const std::map<int, MixerAudioSource*>& mixedParticipantsList) const;
-
   // Clears audioFrameList and reclaims all memory associated with it.
   void ClearAudioFrameList(AudioFrameList* audioFrameList) const;