Reland of "Reporting of decoding_codec_plc events""

This is a reland of 0a88ea050cda58de81d624cf2764d46929447ed5.

The new stat will not be reported unless it is GT 0.

Reporting of decoding_codec_plc events

Bug: webrtc:10838
Change-Id: Ic8585b4eeae9a2643374f15bc2578d1141e59683
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/148448
Reviewed-by: Magnus Flodman <mflodman@webrtc.org>
Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org>
Commit-Queue: Alex Narest <alexnarest@google.com>
Cr-Commit-Position: refs/heads/master@{#28797}
diff --git a/media/base/media_channel.h b/media/base/media_channel.h
index 856dba4..2909126 100644
--- a/media/base/media_channel.h
+++ b/media/base/media_channel.h
@@ -522,7 +522,9 @@
   int decoding_calls_to_silence_generator = 0;
   int decoding_calls_to_neteq = 0;
   int decoding_normal = 0;
+  // TODO(alexnarest): Consider decoding_neteq_plc for consistency
   int decoding_plc = 0;
+  int decoding_codec_plc = 0;
   int decoding_cng = 0;
   int decoding_plc_cng = 0;
   int decoding_muted_output = 0;