Changed default value for the duration of the echo in echocanceller 3

webrtc/modules/audio_processing/aec3/echo_canceller3.cc

 /*
  *  Copyright (c) 2016 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.
  */
 #include "webrtc/modules/audio_processing/aec3/echo_canceller3.h"
@@ skipping 316 matching lines @@
 std::string EchoCanceller3::ToString(
     const AudioProcessing::Config::EchoCanceller3& config) {
   std::stringstream ss;
   ss << "{"
      << "enabled: " << (config.enabled ? "true" : "false") << "}";
   return ss.str();
 }
 
 bool EchoCanceller3::Validate(
     const AudioProcessing::Config::EchoCanceller3& config) {
-  return (config.echo_decay >= 0.f && config.echo_decay < 1.f);
+  return true;
 }
 
 void EchoCanceller3::EmptyRenderQueue() {
   RTC_DCHECK_RUNS_SERIALIZED(&capture_race_checker_);
   bool frame_to_buffer =
       render_transfer_queue_.Remove(&render_queue_output_frame_);
   while (frame_to_buffer) {
     BufferRenderFrameContent(&render_queue_output_frame_, 0, &render_blocker_,
                              block_processor_.get(), &block_, &sub_frame_view_);
 
     if (sample_rate_hz_ != 8000) {
       BufferRenderFrameContent(&render_queue_output_frame_, 1, &render_blocker_,
                                block_processor_.get(), &block_,
                                &sub_frame_view_);
     }
 
     BufferRemainingRenderFrameContent(&render_blocker_, block_processor_.get(),
                                       &block_);
 
     frame_to_buffer =
         render_transfer_queue_.Remove(&render_queue_output_frame_);
   }
 }
 
 }  // namespace webrtc