Revert of Pass time constant to bwe smoothing filter.

webrtc/modules/congestion_controller/probing_interval_estimator_unittest.cc

Index: webrtc/modules/congestion_controller/probing_interval_estimator_unittest.cc
diff --git a/webrtc/modules/congestion_controller/probing_interval_estimator_unittest.cc b/webrtc/modules/congestion_controller/probing_interval_estimator_unittest.cc
index bf10718860fab5a8d1a3526e5ef4d1c935eb0de4..051f3561d31bcc5302d29ef97d9644f00fc5a0d7 100644
--- a/webrtc/modules/congestion_controller/probing_interval_estimator_unittest.cc
+++ b/webrtc/modules/congestion_controller/probing_interval_estimator_unittest.cc
@@ -24,7 +24,6 @@
 
 constexpr int kMinIntervalMs = 2000;
 constexpr int kMaxIntervalMs = 50000;
-constexpr int kDefaultIntervalMs = 3000;
 
 struct ProbingIntervalEstimatorStates {
   std::unique_ptr<ProbingIntervalEstimator> probing_interval_estimator;
@@ -35,13 +34,12 @@
   ProbingIntervalEstimatorStates states;
   states.aimd_rate_control.reset(new MockAimdRateControl());
   states.probing_interval_estimator.reset(new ProbingIntervalEstimator(
-      kMinIntervalMs, kMaxIntervalMs, kDefaultIntervalMs,
-      states.aimd_rate_control.get()));
+      kMinIntervalMs, kMaxIntervalMs, states.aimd_rate_control.get()));
   return states;
 }
 }  // namespace
 
-TEST(ProbingIntervalEstimatorTest, DefaultIntervalUntillWeHaveDrop) {
+TEST(ProbingIntervalEstimatorTest, NoIntervalUntillWeHaveDrop) {
   auto states = CreateProbingIntervalEstimatorStates();
 
   EXPECT_CALL(*states.aimd_rate_control, GetLastBitrateDecreaseBps())
@@ -51,9 +49,9 @@
       .WillOnce(Return(4000))
       .WillOnce(Return(4000));
 
-  EXPECT_EQ(kDefaultIntervalMs,
+  EXPECT_EQ(rtc::Optional<int>(),
             states.probing_interval_estimator->GetIntervalMs());
-  EXPECT_NE(kDefaultIntervalMs,
+  EXPECT_NE(rtc::Optional<int>(),
             states.probing_interval_estimator->GetIntervalMs());
 }
 
@@ -63,7 +61,8 @@
       .WillOnce(Return(rtc::Optional<int>(20000)));
   EXPECT_CALL(*states.aimd_rate_control, GetNearMaxIncreaseRateBps())
       .WillOnce(Return(5000));
-  EXPECT_EQ(4000, states.probing_interval_estimator->GetIntervalMs());
+  EXPECT_EQ(rtc::Optional<int>(4000),
+            states.probing_interval_estimator->GetIntervalMs());
 }
 
 TEST(ProbingIntervalEstimatorTest, IntervalDoesNotExceedMin) {
@@ -72,7 +71,8 @@
       .WillOnce(Return(rtc::Optional<int>(1000)));
   EXPECT_CALL(*states.aimd_rate_control, GetNearMaxIncreaseRateBps())
       .WillOnce(Return(5000));
-  EXPECT_EQ(kMinIntervalMs, states.probing_interval_estimator->GetIntervalMs());
+  EXPECT_EQ(rtc::Optional<int>(kMinIntervalMs),
+            states.probing_interval_estimator->GetIntervalMs());
 }
 
 TEST(ProbingIntervalEstimatorTest, IntervalDoesNotExceedMax) {
@@ -81,6 +81,7 @@
       .WillOnce(Return(rtc::Optional<int>(50000)));
   EXPECT_CALL(*states.aimd_rate_control, GetNearMaxIncreaseRateBps())
       .WillOnce(Return(100));
-  EXPECT_EQ(kMaxIntervalMs, states.probing_interval_estimator->GetIntervalMs());
+  EXPECT_EQ(rtc::Optional<int>(kMaxIntervalMs),
+            states.probing_interval_estimator->GetIntervalMs());
 }
 }  // namespace webrtc