Major updates to the echo removal functionality in AEC3

webrtc/modules/audio_processing/aec3/render_delay_buffer.cc

Index: webrtc/modules/audio_processing/aec3/render_delay_buffer.cc
diff --git a/webrtc/modules/audio_processing/aec3/render_delay_buffer.cc b/webrtc/modules/audio_processing/aec3/render_delay_buffer.cc
index fdff0526a076f0852a2f1600983bcdd1f9c07a99..a816b4c7eb96866729ec47b264c0696f511c1c83 100644
--- a/webrtc/modules/audio_processing/aec3/render_delay_buffer.cc
+++ b/webrtc/modules/audio_processing/aec3/render_delay_buffer.cc
@@ -104,10 +104,11 @@ class RenderDelayBufferImpl final : public RenderDelayBuffer {
 
 RenderDelayBufferImpl::RenderDelayBufferImpl(size_t num_bands)
     : optimization_(DetectOptimization()),
-      fft_buffer_(optimization_,
-                  num_bands,
-                  std::max(30, kAdaptiveFilterLength),
-                  std::vector<size_t>(1, kAdaptiveFilterLength)),
+      fft_buffer_(
+          optimization_,
+          num_bands,
+          std::max(kResidualEchoPowerRenderWindowSize, kAdaptiveFilterLength),
+          std::vector<size_t>(1, kAdaptiveFilterLength)),
       api_call_jitter_buffer_(num_bands) {
   buffer_.fill(std::vector<std::vector<float>>(
       num_bands, std::vector<float>(kBlockSize, 0.f)));