Use backticks not vertical bars to denote variables in comments for /modules/video_coding

Bug: webrtc:12338
Change-Id: Ia8a9adea291d594e4f59a6a1203a7bfb0758adac
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227165
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34684}
diff --git a/modules/video_coding/session_info.cc b/modules/video_coding/session_info.cc
index 150fc77c..bee763c 100644
--- a/modules/video_coding/session_info.cc
+++ b/modules/video_coding/session_info.cc
@@ -292,7 +292,7 @@
   return complete_;
 }
 
-// Find the end of the NAL unit which the packet pointed to by |packet_it|
+// Find the end of the NAL unit which the packet pointed to by `packet_it`
 // belongs to. Returns an iterator to the last packet of the frame if the end
 // of the NAL unit wasn't found.
 VCMSessionInfo::PacketIterator VCMSessionInfo::FindNaluEnd(
@@ -491,7 +491,7 @@
     }
   }
 
-  // The insert operation invalidates the iterator |rit|.
+  // The insert operation invalidates the iterator `rit`.
   PacketIterator packet_list_it = packets_.insert(rit.base(), packet);
 
   size_t returnLength = InsertBuffer(frame_buffer, packet_list_it);