Use backticks not vertical bars to denote variables in comments

Bug: webrtc:12338
Change-Id: I89c8b3a328d04203177522cbdfd9e606fd4bce4c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/228246
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34696}
diff --git a/api/ice_transport_factory.h b/api/ice_transport_factory.h
index a9fd04e..2268ea5 100644
--- a/api/ice_transport_factory.h
+++ b/api/ice_transport_factory.h
@@ -35,9 +35,9 @@
 // without using a webrtc::PeerConnection.
 // The returned object must be accessed and destroyed on the thread that
 // created it.
-// |init.port_allocator()| is required and must outlive the created
+// `init.port_allocator()` is required and must outlive the created
 //     IceTransportInterface object.
-// |init.async_resolver_factory()| and |init.event_log()| are optional, but if
+// `init.async_resolver_factory()` and `init.event_log()` are optional, but if
 //     provided must outlive the created IceTransportInterface object.
 RTC_EXPORT rtc::scoped_refptr<IceTransportInterface> CreateIceTransport(
     IceTransportInit);