Added forced zero AEC output after call startup and echo path changes

webrtc/modules/audio_processing/aec3/suppression_gain.h

 /*
  *  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 34 matching lines @@
 
 class SuppressionGain {
  public:
   explicit SuppressionGain(Aec3Optimization optimization);
   void GetGain(const std::array<float, kFftLengthBy2Plus1>& nearend_power,
                const std::array<float, kFftLengthBy2Plus1>& residual_echo_power,
                const std::array<float, kFftLengthBy2Plus1>& comfort_noise_power,
                bool saturated_echo,
                const std::vector<std::vector<float>>& render,
                size_t num_capture_bands,
+               bool force_zero_gain,
                float* high_bands_gain,
                std::array<float, kFftLengthBy2Plus1>* low_band_gain);
 
  private:
   const Aec3Optimization optimization_;
   std::array<float, kFftLengthBy2 - 1> previous_gain_squared_;
   std::array<float, kFftLengthBy2 - 1> previous_masker_;
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(SuppressionGain);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_