Add logging of delay-based bandwidth estimate.

webrtc/modules/congestion_controller/delay_based_bwe_unittest.cc

Index: webrtc/modules/congestion_controller/delay_based_bwe_unittest.cc
diff --git a/webrtc/modules/congestion_controller/delay_based_bwe_unittest.cc b/webrtc/modules/congestion_controller/delay_based_bwe_unittest.cc
index 4f0829ac6291feb1d8043d8be25c4439dc49b1c8..dd24b5327283e036ccce39e217633055b32e43b1 100644
--- a/webrtc/modules/congestion_controller/delay_based_bwe_unittest.cc
+++ b/webrtc/modules/congestion_controller/delay_based_bwe_unittest.cc
@@ -174,7 +174,7 @@ class DelayBasedBweExperimentTest : public DelayBasedBweTest {
  public:
   DelayBasedBweExperimentTest()
       : override_field_trials_("WebRTC-ImprovedBitrateEstimate/Enabled/") {
-    bitrate_estimator_.reset(new DelayBasedBwe(&clock_));
+    bitrate_estimator_.reset(new DelayBasedBwe(nullptr, &clock_));
   }
 
  private:
@@ -205,7 +205,7 @@ class DelayBasedBweTrendlineExperimentTest : public DelayBasedBweTest {
  public:
   DelayBasedBweTrendlineExperimentTest()
       : override_field_trials_("WebRTC-BweTrendlineFilter/Enabled-15,0.9,4/") {
-    bitrate_estimator_.reset(new DelayBasedBwe(&clock_));
+    bitrate_estimator_.reset(new DelayBasedBwe(nullptr, &clock_));
   }
 
  private:
@@ -236,7 +236,7 @@ class DelayBasedBweMedianSlopeExperimentTest : public DelayBasedBweTest {
  public:
   DelayBasedBweMedianSlopeExperimentTest()
       : override_field_trials_("WebRTC-BweMedianSlopeFilter/Enabled-20,4/") {
-    bitrate_estimator_.reset(new DelayBasedBwe(&clock_));
+    bitrate_estimator_.reset(new DelayBasedBwe(nullptr, &clock_));
   }
 
  private: