Increased the size of the delay estimation look window

Bug: webrtc:8889,chromium:812524
Change-Id: I508a0d3619b90f6a8851db66c151a980b14adb55
Reviewed-on: https://webrtc-review.googlesource.com/53640
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Commit-Queue: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22030}
diff --git a/api/audio/echo_canceller3_config.h b/api/audio/echo_canceller3_config.h
index 7546770..017e518 100644
--- a/api/audio/echo_canceller3_config.h
+++ b/api/audio/echo_canceller3_config.h
@@ -20,7 +20,7 @@
   struct Delay {
     size_t default_delay = 5;
     size_t down_sampling_factor = 4;
-    size_t num_filters = 4;
+    size_t num_filters = 5;
     size_t api_call_jitter_blocks = 26;
     size_t min_echo_path_delay_blocks = 0;
     size_t delay_headroom_blocks = 2;