Using unit classes in BitrateAllocationUpdate struct.

This prepares for moving BitrateAllocationUpdate to API.

Bug: webrtc:9718
Change-Id: Ib2bcedb6b68fde33b6a2466f40829e86438aa973
Reviewed-on: https://webrtc-review.googlesource.com/c/111507
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Oskar Sundbom <ossu@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25737}
diff --git a/audio/audio_send_stream_unittest.cc b/audio/audio_send_stream_unittest.cc
index ddd3408..d89acd5 100644
--- a/audio/audio_send_stream_unittest.cc
+++ b/audio/audio_send_stream_unittest.cc
@@ -474,10 +474,10 @@
   EXPECT_CALL(*helper.channel_send(),
               SetBitrate(helper.config().max_bitrate_bps, _));
   BitrateAllocationUpdate update;
-  update.bitrate_bps = helper.config().max_bitrate_bps + 5000;
-  update.fraction_loss = 0;
-  update.rtt = 50;
-  update.bwe_period_ms = 6000;
+  update.target_bitrate = DataRate::bps(helper.config().max_bitrate_bps + 5000);
+  update.packet_loss_ratio = 0;
+  update.round_trip_time = TimeDelta::ms(50);
+  update.bwe_period = TimeDelta::ms(6000);
   send_stream->OnBitrateUpdated(update);
 }
 
@@ -486,10 +486,10 @@
   auto send_stream = helper.CreateAudioSendStream();
   EXPECT_CALL(*helper.channel_send(), SetBitrate(_, 5000));
   BitrateAllocationUpdate update;
-  update.bitrate_bps = helper.config().max_bitrate_bps + 5000;
-  update.fraction_loss = 0;
-  update.rtt = 50;
-  update.bwe_period_ms = 5000;
+  update.target_bitrate = DataRate::bps(helper.config().max_bitrate_bps + 5000);
+  update.packet_loss_ratio = 0;
+  update.round_trip_time = TimeDelta::ms(50);
+  update.bwe_period = TimeDelta::ms(5000);
   send_stream->OnBitrateUpdated(update);
 }