Allow extracting the linear AEC output

This CL enables extracting the linear AEC output,
allowing for more straightforward
testing/development.

Bug: b/140823178
Change-Id: I14f7934008d87066b35500466cb6e6d96f811688
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/153672
Commit-Queue: Per Åhgren <peah@webrtc.org>
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29789}
diff --git a/api/audio/echo_canceller3_config.h b/api/audio/echo_canceller3_config.h
index 3387526..c8de797 100644
--- a/api/audio/echo_canceller3_config.h
+++ b/api/audio/echo_canceller3_config.h
@@ -79,6 +79,7 @@
     bool conservative_initial_phase = false;
     bool enable_shadow_filter_output_usage = true;
     bool use_linear_filter = true;
+    bool export_linear_aec_output = false;
   } filter;
 
   struct Erle {
@@ -185,8 +186,6 @@
     } high_bands_suppression;
 
     float floor_first_increase = 0.00001f;
-    bool enforce_transparent = false;
-    bool enforce_empty_higher_bands = false;
   } suppressor;
 };
 }  // namespace webrtc