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 15c6f7572f9a6e5a8fedebd2308676b1b166be43..3bf180e22c07f43724e88cf4d1815f6955001232 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.h
+++ b/webrtc/modules/audio_processing/audio_processing_impl.h
@@ -38,6 +38,7 @@ class HighPassFilterImpl;
 class LevelEstimatorImpl;
 class NoiseSuppressionImpl;
 class ProcessingComponent;
+class RepetitionDetector;
 class TransientSuppressor;
 class VoiceDetectionImpl;
 class IntelligibilityEnhancer;
@@ -205,6 +206,8 @@ class AudioProcessingImpl : public AudioProcessing {
   rtc::scoped_ptr<Beamformer<float>> beamformer_;
   const std::vector<Point> array_geometry_;
 
+  rtc::scoped_ptr<RepetitionDetector> repetition_detector_
+      GUARDED_BY(crit_);
   bool intelligibility_enabled_;
   rtc::scoped_ptr<IntelligibilityEnhancer> intelligibility_enhancer_;
 };