Removed the memory pool from the 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 de5fd46dfe5a86302d35ae45e75efbb92bba42d6..be70eeef5549082c69344908e4614bdf1147db28 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
@@ -61,7 +61,8 @@ class NewAudioConferenceMixerImpl : public NewAudioConferenceMixer {
   enum { kProcessPeriodicityInMs = 10 };
 
   explicit NewAudioConferenceMixerImpl(int id);
-  ~NewAudioConferenceMixerImpl();
+  // The dtor not needed, because this class does no longer manage
+  // memory.
 
   // Must be called after ctor.
   bool Init();
@@ -78,8 +79,6 @@ class NewAudioConferenceMixerImpl : public NewAudioConferenceMixer {
       const MixerAudioSource& participant) const override;
 
  private:
-  enum { DEFAULT_AUDIO_FRAME_POOLSIZE = 50 };
-
   // Set/get mix frequency
   int32_t SetOutputFrequency(const Frequency& frequency);
   Frequency OutputFrequency() const;
@@ -148,9 +147,6 @@ class NewAudioConferenceMixerImpl : public NewAudioConferenceMixer {
   Frequency _outputFrequency;
   size_t _sampleSize;
 
-  // Memory pool to avoid allocating/deallocating AudioFrames
-  MemoryPool<AudioFrame>* _audioFramePool;
-
   // List of all participants. Note all lists are disjunct
   MixerAudioSourceList _participantList;  // May be mixed.
   // Always mixed, anonomously.