Major AEC3 render pipeline changes

webrtc/modules/audio_processing/aec3/block_processor.h

 /*
  *  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.
  */
 
@@ skipping 24 matching lines @@
       std::unique_ptr<EchoRemover> echo_remover);
 
   virtual ~BlockProcessor() = default;
 
   // Processes a block of capture data.
   virtual void ProcessCapture(
       bool echo_path_gain_change,
       bool capture_signal_saturation,
       std::vector<std::vector<float>>* capture_block) = 0;
 
-  // Buffers a block of render data supplied by a FrameBlocker object. Returns a
-  // bool indicating the success of the buffering.
-  virtual bool BufferRender(std::vector<std::vector<float>>* render_block) = 0;
+  // Buffers a block of render data supplied by a FrameBlocker object.
+  virtual void BufferRender(
+      const std::vector<std::vector<float>>& render_block) = 0;
 
   // Reports whether echo leakage has been detected in the echo canceller
   // output.
   virtual void UpdateEchoLeakageStatus(bool leakage_detected) = 0;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_BLOCK_PROCESSOR_H_