Fix tests.

Adopt changes to GetBaseDelta from versatica#900
Add tests for GetBaseDelta Wraparound.

worker/deps/libwebrtc/libwebrtc/modules/remote_bitrate_estimator/inter_arrival.cc

@@ -48,7 +48,7 @@ bool InterArrival::ComputeDeltas(uint32_t timestamp,
     current_timestamp_group_.timestamp = timestamp;
     current_timestamp_group_.first_timestamp = timestamp;
     current_timestamp_group_.first_arrival_ms = arrival_time_ms;
-  } else if (!PacketInOrder(timestamp, arrival_time_ms)) {
+  } else if (!PacketInOrder(timestamp)) {
     return false;
   } else if (NewTimestampGroup(arrival_time_ms, timestamp)) {
     // First packet of a later frame, the previous frame sample is ready.
@@ -115,17 +115,9 @@ bool InterArrival::ComputeDeltas(uint32_t timestamp,
   return calculated_deltas;
 }
 
-bool InterArrival::PacketInOrder(uint32_t timestamp, int64_t arrival_time_ms) {
+bool InterArrival::PacketInOrder(uint32_t timestamp) {
   if (current_timestamp_group_.IsFirstPacket()) {
     return true;
-  } else if (arrival_time_ms < 0) {
-    // NOTE: Change related to https://github.com/versatica/mediasoup/issues/357
-    //
-    // Sometimes we do get negative arrival time, which causes BelongsToBurst()
-    // to fail, which may cause anything that uses InterArrival to crash.
-    //
-    // Credits to @sspanak and @Ivaka.
-    return false;
   } else {
     // Assume that a diff which is bigger than half the timestamp interval
     // (32 bits) must be due to reordering. This code is almost identical to

worker/deps/libwebrtc/libwebrtc/modules/remote_bitrate_estimator/inter_arrival.h

@@ -71,11 +71,7 @@ class InterArrival {
   };
 
   // Returns true if the packet with timestamp |timestamp| arrived in order.
-  //
-  // NOTE: Change related to https://github.com/versatica/mediasoup/issues/357
-  //
-  // bool PacketInOrder(uint32_t timestamp);
-  bool PacketInOrder(uint32_t timestamp, int64_t arrival_time_ms);
+  bool PacketInOrder(uint32_t timestamp);
 
   // Returns true if the last packet was the end of the current batch and the
   // packet with |timestamp| is the first of a new batch.