Remove SetLatency/GetLatency from MediaSourceInterface API level

Bug: webrtc:10287
Change-Id: I74fad31db98b75791085688438064f9510b0b6fa
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/133165
Commit-Queue: Ruslan Burakov <kuddai@google.com>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27692}
diff --git a/api/rtp_receiver_interface.h b/api/rtp_receiver_interface.h
index d1ef137..3934215 100644
--- a/api/rtp_receiver_interface.h
+++ b/api/rtp_receiver_interface.h
@@ -131,10 +131,9 @@
   // Sets the jitter buffer minimum delay until media playout. Actual observed
   // delay may differ depending on the congestion control. |delay_seconds| is a
   // positive value including 0.0 measured in seconds. |nullopt| means default
-  // value must be used. TODO(kuddai): remove the default implmenetation once
-  // the subclasses in Chromium implement this.
+  // value must be used.
   virtual void SetJitterBufferMinimumDelay(
-      absl::optional<double> delay_seconds);
+      absl::optional<double> delay_seconds) = 0;
 
   // TODO(zhihuang): Remove the default implementation once the subclasses
   // implement this. Currently, the only relevant subclass is the