Major AEC3 render pipeline changes

webrtc/modules/audio_processing/aec3/block_processor.h

Index: webrtc/modules/audio_processing/aec3/block_processor.h
diff --git a/webrtc/modules/audio_processing/aec3/block_processor.h b/webrtc/modules/audio_processing/aec3/block_processor.h
index 12a994e609d6103cc4bb9d00350f09949f314040..830fec7e6635d1814df67e6a071694f7993fad75 100644
--- a/webrtc/modules/audio_processing/aec3/block_processor.h
+++ b/webrtc/modules/audio_processing/aec3/block_processor.h
@@ -42,9 +42,9 @@ class BlockProcessor {
       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.