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

Bug: webrtc:12338
Change-Id: Ifaad29ccb63b0f2f3aeefb77dae061ebc7f87e6c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227024
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34561}
diff --git a/sdk/android/api/org/webrtc/RendererCommon.java b/sdk/android/api/org/webrtc/RendererCommon.java
index 5865b07..b97901c 100644
--- a/sdk/android/api/org/webrtc/RendererCommon.java
+++ b/sdk/android/api/org/webrtc/RendererCommon.java
@@ -123,9 +123,9 @@
   //    clipped.
   // SCALE_ASPECT_BALANCED - Compromise between FIT and FILL. Video frame will fill as much as
   // possible of the view while maintaining aspect ratio, under the constraint that at least
-  // |BALANCED_VISIBLE_FRACTION| of the frame content will be shown.
+  // `BALANCED_VISIBLE_FRACTION` of the frame content will be shown.
   public static enum ScalingType { SCALE_ASPECT_FIT, SCALE_ASPECT_FILL, SCALE_ASPECT_BALANCED }
-  // The minimum fraction of the frame content that will be shown for |SCALE_ASPECT_BALANCED|.
+  // The minimum fraction of the frame content that will be shown for `SCALE_ASPECT_BALANCED`.
   // This limits excessive cropping when adjusting display size.
   private static float BALANCED_VISIBLE_FRACTION = 0.5625f;
 
@@ -209,7 +209,7 @@
   }
 
   /**
-   * Move |matrix| transformation origin to (0.5, 0.5). This is the origin for texture coordinates
+   * Move `matrix` transformation origin to (0.5, 0.5). This is the origin for texture coordinates
    * that are in the range 0 to 1.
    */
   private static void adjustOrigin(float[] matrix) {