Reset InterArrival if arrival time clock makes a jump.

webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_unittest_helper.cc

Index: webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_unittest_helper.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_unittest_helper.cc b/webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_unittest_helper.cc
index f9588096a070226e1d4cc18e9e68bc07c9d1d5f8..c9f0dde58dca7c996d660a76d718963e743568e4 100644
--- a/webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_unittest_helper.cc
+++ b/webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_unittest_helper.cc
@@ -231,7 +231,7 @@ void RemoteBitrateEstimatorTest::IncomingPacket(uint32_t ssrc,
   header.timestamp = rtp_timestamp;
   header.extension.hasAbsoluteSendTime = true;
   header.extension.absoluteSendTime = absolute_send_time;
-  bitrate_estimator_->IncomingPacket(arrival_time + kArrivalTimeClockOffsetMs,
+  bitrate_estimator_->IncomingPacket(arrival_time + arrival_time_offset_ms_,
                                      payload_size, header);
 }
 
@@ -429,7 +429,8 @@ void RemoteBitrateEstimatorTest::RateIncreaseRtpTimestampsTestHelper(
 void RemoteBitrateEstimatorTest::CapacityDropTestHelper(
     int number_of_streams,
     bool wrap_time_stamp,
-    uint32_t expected_bitrate_drop_delta) {
+    uint32_t expected_bitrate_drop_delta,
+    int64_t receiver_clock_offset_change_ms) {
   const int kFramerate = 30;
   const int kStartBitrate = 900e3;
   const int kMinExpectedBitrate = 800e3;
@@ -477,6 +478,9 @@ void RemoteBitrateEstimatorTest::CapacityDropTestHelper(
   EXPECT_NEAR(kInitialCapacityBps, bitrate_bps, 130000u);
   bitrate_observer_->Reset();
 
+  // Add an offset to make sure the BWE can handle it.
+  arrival_time_offset_ms_ += receiver_clock_offset_change_ms;
+
   // Reduce the capacity and verify the decrease time.
   stream_generator_->set_capacity_bps(kReducedCapacityBps);
   int64_t overuse_start_time = clock_.TimeInMilliseconds();