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

Bug: webrtc:12338
Change-Id: Ib97b2c3d64dbd895f261ffa76a2e885bd934a87f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226940
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34554}
diff --git a/api/stats/rtcstats_objects.h b/api/stats/rtcstats_objects.h
index 6995db8..b18ef97 100644
--- a/api/stats/rtcstats_objects.h
+++ b/api/stats/rtcstats_objects.h
@@ -197,7 +197,7 @@
 };
 
 // https://w3c.github.io/webrtc-stats/#icecandidate-dict*
-// TODO(hbos): |RTCStatsCollector| only collects candidates that are part of
+// TODO(hbos): `RTCStatsCollector` only collects candidates that are part of
 // ice candidate pairs, but there could be candidates not paired with anything.
 // crbug.com/632723
 // TODO(qingsi): Add the stats of STUN binding requests (keepalives) and collect
@@ -221,7 +221,7 @@
   // TODO(hbos): Support enum types? "RTCStatsMember<RTCIceCandidateType>"?
   RTCStatsMember<std::string> candidate_type;
   RTCStatsMember<int32_t> priority;
-  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/632723
+  // TODO(hbos): Not collected by `RTCStatsCollector`. crbug.com/632723
   RTCStatsMember<std::string> url;
 
  protected:
@@ -232,8 +232,8 @@
 };
 
 // In the spec both local and remote varieties are of type RTCIceCandidateStats.
-// But here we define them as subclasses of |RTCIceCandidateStats| because the
-// |kType| need to be different ("RTCStatsType type") in the local/remote case.
+// But here we define them as subclasses of `RTCIceCandidateStats` because the
+// `kType` need to be different ("RTCStatsType type") in the local/remote case.
 // https://w3c.github.io/webrtc-stats/#rtcstatstype-str*
 // This forces us to have to override copy() and type().
 class RTC_EXPORT RTCLocalIceCandidateStats final : public RTCIceCandidateStats {
@@ -289,28 +289,28 @@
   RTCStatsMember<std::string> media_source_id;
   RTCStatsMember<bool> remote_source;
   RTCStatsMember<bool> ended;
-  // TODO(hbos): |RTCStatsCollector| does not return stats for detached tracks.
+  // TODO(hbos): `RTCStatsCollector` does not return stats for detached tracks.
   // crbug.com/659137
   RTCStatsMember<bool> detached;
-  // See |RTCMediaStreamTrackKind| for valid values.
+  // See `RTCMediaStreamTrackKind` for valid values.
   RTCStatsMember<std::string> kind;
   RTCStatsMember<double> jitter_buffer_delay;
   RTCStatsMember<uint64_t> jitter_buffer_emitted_count;
   // Video-only members
   RTCStatsMember<uint32_t> frame_width;
   RTCStatsMember<uint32_t> frame_height;
-  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/659137
+  // TODO(hbos): Not collected by `RTCStatsCollector`. crbug.com/659137
   RTCStatsMember<double> frames_per_second;
   RTCStatsMember<uint32_t> frames_sent;
   RTCStatsMember<uint32_t> huge_frames_sent;
   RTCStatsMember<uint32_t> frames_received;
   RTCStatsMember<uint32_t> frames_decoded;
   RTCStatsMember<uint32_t> frames_dropped;
-  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/659137
+  // TODO(hbos): Not collected by `RTCStatsCollector`. crbug.com/659137
   RTCStatsMember<uint32_t> frames_corrupted;
-  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/659137
+  // TODO(hbos): Not collected by `RTCStatsCollector`. crbug.com/659137
   RTCStatsMember<uint32_t> partial_frames_lost;
-  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/659137
+  // TODO(hbos): Not collected by `RTCStatsCollector`. crbug.com/659137
   RTCStatsMember<uint32_t> full_frames_lost;
   // Audio-only members
   RTCStatsMember<double> audio_level;         // Receive-only