Pass time constant to bwe smoothing filter.

webrtc/modules/congestion_controller/include/mock/mock_congestion_controller.h

Index: webrtc/modules/congestion_controller/include/mock/mock_congestion_controller.h
diff --git a/webrtc/modules/congestion_controller/include/mock/mock_congestion_controller.h b/webrtc/modules/congestion_controller/include/mock/mock_congestion_controller.h
index 128d64ea983273f5234ce9b900fc3d0decdaf74e..5ce315c0df1f42a84fe83234590ec0aca4c5874d 100644
--- a/webrtc/modules/congestion_controller/include/mock/mock_congestion_controller.h
+++ b/webrtc/modules/congestion_controller/include/mock/mock_congestion_controller.h
@@ -21,10 +21,11 @@ namespace test {
 
 class MockCongestionObserver : public CongestionController::Observer {
  public:
-  MOCK_METHOD3(OnNetworkChanged,
+  MOCK_METHOD4(OnNetworkChanged,
                void(uint32_t bitrate_bps,
                     uint8_t fraction_loss,
-                    int64_t rtt_ms));
+                    int64_t rtt_ms,
+                    int probing_interval_ms));
 };
 
 class MockCongestionController : public CongestionController {