Fix race / crash in OnNetworkRouteChanged().

webrtc/modules/bitrate_controller/bitrate_controller_unittest.cc

Index: webrtc/modules/bitrate_controller/bitrate_controller_unittest.cc
diff --git a/webrtc/modules/bitrate_controller/bitrate_controller_unittest.cc b/webrtc/modules/bitrate_controller/bitrate_controller_unittest.cc
index 43060e2d1adbb5951d78544f08fd5121c3dfdb89..d160cc76d232b4847c720f3fd74269440eba4813 100644
--- a/webrtc/modules/bitrate_controller/bitrate_controller_unittest.cc
+++ b/webrtc/modules/bitrate_controller/bitrate_controller_unittest.cc
@@ -169,7 +169,8 @@ TEST_F(BitrateControllerTest, OneBitrateObserverOneRtcpObserver) {
   EXPECT_EQ(300000, bitrate_observer_.last_bitrate_);
 
   // Test that a low delay-based estimate limits the combined estimate.
-  controller_->OnReceiveBitrateChanged({0}, 280000);
+  webrtc::DelayBasedBwe::Result result(false, 280000);
+  controller_->OnDelayBasedBweResult(result);
   EXPECT_EQ(280000, bitrate_observer_.last_bitrate_);
 
   // Test that a low REMB limits the combined estimate.