Corrected the behavior in AEC3 during buffer overruns and underruns

webrtc/modules/audio_processing/aec3/subtractor.cc

 /*
  *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 37 matching lines @@
 }
 
 Subtractor::~Subtractor() {}
 
 void Subtractor::HandleEchoPathChange(
     const EchoPathVariability& echo_path_variability) {
   if (echo_path_variability.delay_change) {
     main_filter_.HandleEchoPathChange();
     shadow_filter_.HandleEchoPathChange();
     G_main_.HandleEchoPathChange();
+    G_shadow_.HandleEchoPathChange();
   }
 }
 
 void Subtractor::Process(const RenderBuffer& render_buffer,
                          const rtc::ArrayView<const float> capture,
                          const RenderSignalAnalyzer& render_signal_analyzer,
                          const AecState& aec_state,
                          SubtractorOutput* output) {
   RTC_DCHECK_EQ(kBlockSize, capture.size());
   rtc::ArrayView<const float> y = capture;
@@ skipping 31 matching lines @@
   shadow_filter_.Adapt(render_buffer, G);
 
   data_dumper_->DumpRaw("aec3_subtractor_G_shadow", G.re);
   data_dumper_->DumpRaw("aec3_subtractor_G_shadow", G.im);
 
   main_filter_.DumpFilter("aec3_subtractor_H_main");
   shadow_filter_.DumpFilter("aec3_subtractor_H_shadow");
 }
 
 }  // namespace webrtc