Only update Intelligibility Enhancer gains every 10 chunks

webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h

Index: webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
index 63ae80e2c44060853bd6578e8895036609aaa581..389f6ae5679cd7e01080c9892ba972c202fc3d0c 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
@@ -112,6 +112,8 @@ class IntelligibilityEnhancer : public LappedTransform::Callback {
   float snr_;
   bool is_active_;
 
+  size_t num_chunks_;
+
   std::vector<float> noise_estimation_buffer_;
   SwapQueue<std::vector<float>, RenderQueueItemVerifier<float>>
       noise_estimation_queue_;