Adding audio RepetitionDetector in AudioProcessingModule.

webrtc/modules/audio_processing/audio_processing_impl.h

Index: webrtc/modules/audio_processing/audio_processing_impl.h
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.h b/webrtc/modules/audio_processing/audio_processing_impl.h
index a44b5a8f41320d10ac6587a30937dd43cb430531..9c58db1bc05c47a8cfa62d6fc80bf6a4a6b2b4a0 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.h
+++ b/webrtc/modules/audio_processing/audio_processing_impl.h
@@ -37,6 +37,7 @@ class HighPassFilterImpl;
 class LevelEstimatorImpl;
 class NoiseSuppressionImpl;
 class ProcessingComponent;
+class RepetitionDetector;
 class TransientSuppressor;
 class VoiceDetectionImpl;
 
@@ -191,6 +192,8 @@ class AudioProcessingImpl : public AudioProcessing {
   const bool beamformer_enabled_;
   rtc::scoped_ptr<Beamformer<float>> beamformer_;
   const std::vector<Point> array_geometry_;
+
+  rtc::scoped_ptr<RepetitionDetector> repetition_detector_ GUARDED_BY(crit_);
 };
 
 }  // namespace webrtc