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/receiver_unittest.cc b/modules/video_coding/receiver_unittest.cc
index b2d5bc6..1b6ee34 100644
--- a/modules/video_coding/receiver_unittest.cc
+++ b/modules/video_coding/receiver_unittest.cc
@@ -244,15 +244,15 @@
         receiver_(receiver) {}
   virtual ~SimulatedClockWithFrames() {}
 
-  // If |stop_on_frame| is true and next frame arrives between now and
-  // now+|milliseconds|, the clock will be advanced to the arrival time of next
+  // If `stop_on_frame` is true and next frame arrives between now and
+  // now+`milliseconds`, the clock will be advanced to the arrival time of next
   // frame.
-  // Otherwise, the clock will be advanced by |milliseconds|.
+  // Otherwise, the clock will be advanced by `milliseconds`.
   //
   // For both cases, a frame will be inserted into the jitter buffer at the
   // instant when the clock time is timestamps_.front().arrive_time.
   //
-  // Return true if some frame arrives between now and now+|milliseconds|.
+  // Return true if some frame arrives between now and now+`milliseconds`.
   bool AdvanceTimeMilliseconds(int64_t milliseconds, bool stop_on_frame) {
     return AdvanceTimeMicroseconds(milliseconds * 1000, stop_on_frame);
   }
@@ -282,10 +282,10 @@
   }
 
   // Input timestamps are in unit Milliseconds.
-  // And |arrive_timestamps| must be positive and in increasing order.
-  // |arrive_timestamps| determine when we are going to insert frames into the
+  // And `arrive_timestamps` must be positive and in increasing order.
+  // `arrive_timestamps` determine when we are going to insert frames into the
   // jitter buffer.
-  // |render_timestamps| are the timestamps on the frame.
+  // `render_timestamps` are the timestamps on the frame.
   void SetFrames(const int64_t* arrive_timestamps,
                  const int64_t* render_timestamps,
                  size_t size) {
@@ -328,12 +328,12 @@
 
 // Use a SimulatedClockWithFrames
 // Wait call will do either of these:
-// 1. If |stop_on_frame| is true, the clock will be turned to the exact instant
+// 1. If `stop_on_frame` is true, the clock will be turned to the exact instant
 // that the first frame comes and the frame will be inserted into the jitter
-// buffer, or the clock will be turned to now + |max_time| if no frame comes in
+// buffer, or the clock will be turned to now + `max_time` if no frame comes in
 // the window.
-// 2. If |stop_on_frame| is false, the clock will be turn to now + |max_time|,
-// and all the frames arriving between now and now + |max_time| will be
+// 2. If `stop_on_frame` is false, the clock will be turn to now + `max_time`,
+// and all the frames arriving between now and now + `max_time` will be
 // inserted into the jitter buffer.
 //
 // This is used to simulate the JitterBuffer getting packets from internet as
@@ -382,9 +382,9 @@
 };
 
 // Test whether VCMReceiver::FrameForDecoding handles parameter
-// |max_wait_time_ms| correctly:
-// 1. The function execution should never take more than |max_wait_time_ms|.
-// 2. If the function exit before now + |max_wait_time_ms|, a frame must be
+// `max_wait_time_ms` correctly:
+// 1. The function execution should never take more than `max_wait_time_ms`.
+// 2. If the function exit before now + `max_wait_time_ms`, a frame must be
 //    returned.
 TEST_F(VCMReceiverTimingTest, FrameForDecoding) {
   const size_t kNumFrames = 100;
@@ -436,9 +436,9 @@
 }
 
 // Test whether VCMReceiver::FrameForDecoding handles parameter
-// |prefer_late_decoding| and |max_wait_time_ms| correctly:
-// 1. The function execution should never take more than |max_wait_time_ms|.
-// 2. If the function exit before now + |max_wait_time_ms|, a frame must be
+// `prefer_late_decoding` and `max_wait_time_ms` correctly:
+// 1. The function execution should never take more than `max_wait_time_ms`.
+// 2. If the function exit before now + `max_wait_time_ms`, a frame must be
 //    returned and the end time must be equal to the render timestamp - delay
 //    for decoding and rendering.
 TEST_F(VCMReceiverTimingTest, FrameForDecodingPreferLateDecoding) {