Automated g4 rollback of changelist 515174710.

*** Reason for rollback ***

@ianswett suggested a completely different way of doing this.

*** Original change description ***

Congestion Control interface for receiving ECN feedback.

***

PiperOrigin-RevId: 515439941

quiche/quic/core/congestion_control/bbr2_sender.h

diff --git a/quiche/quic/core/congestion_control/bbr2_sender.h b/quiche/quic/core/congestion_control/bbr2_sender.h
index d808791..7f47a4e 100644
--- a/quiche/quic/core/congestion_control/bbr2_sender.h
+++ b/quiche/quic/core/congestion_control/bbr2_sender.h
@@ -92,9 +92,6 @@
   void OnApplicationLimited(QuicByteCount bytes_in_flight) override;
 
   void PopulateConnectionStats(QuicConnectionStats* stats) const override;
-
-  void CongestionExperienced(QuicPacketCount /*num_ce*/,
-                             QuicPacketCount /*num_ect*/) override {}
   // End implementation of SendAlgorithmInterface.
 
   const Bbr2Params& Params() const { return params_; }

quiche/quic/core/congestion_control/bbr_sender.h

diff --git a/quiche/quic/core/congestion_control/bbr_sender.h b/quiche/quic/core/congestion_control/bbr_sender.h
index 774cb7e..5f711fd 100644
--- a/quiche/quic/core/congestion_control/bbr_sender.h
+++ b/quiche/quic/core/congestion_control/bbr_sender.h
@@ -130,8 +130,6 @@
   std::string GetDebugState() const override;
   void OnApplicationLimited(QuicByteCount bytes_in_flight) override;
   void PopulateConnectionStats(QuicConnectionStats* stats) const override;
-  void CongestionExperienced(QuicPacketCount /*num_ce*/,
-                             QuicPacketCount /*num_ect*/) override {}
   // End implementation of SendAlgorithmInterface.
 
   // Gets the number of RTTs BBR remains in STARTUP phase.

quiche/quic/core/congestion_control/send_algorithm_interface.h

diff --git a/quiche/quic/core/congestion_control/send_algorithm_interface.h b/quiche/quic/core/congestion_control/send_algorithm_interface.h
index 82be341..db14a1e 100644
--- a/quiche/quic/core/congestion_control/send_algorithm_interface.h
+++ b/quiche/quic/core/congestion_control/send_algorithm_interface.h
@@ -160,11 +160,6 @@
 
   // Called before connection close to collect stats.
   virtual void PopulateConnectionStats(QuicConnectionStats* stats) const = 0;
-
-  // Called when the connection has received feedback about received
-  // Explicit Congestion Notification (ECN) marks.
-  virtual void CongestionExperienced(QuicPacketCount num_ce,
-                                     QuicPacketCount num_ect) = 0;
 };
 
 }  // namespace quic

quiche/quic/core/congestion_control/tcp_cubic_sender_bytes.h

diff --git a/quiche/quic/core/congestion_control/tcp_cubic_sender_bytes.h b/quiche/quic/core/congestion_control/tcp_cubic_sender_bytes.h
index ae24c8c..2531e5a 100644
--- a/quiche/quic/core/congestion_control/tcp_cubic_sender_bytes.h
+++ b/quiche/quic/core/congestion_control/tcp_cubic_sender_bytes.h
@@ -72,8 +72,6 @@
   std::string GetDebugState() const override;
   void OnApplicationLimited(QuicByteCount bytes_in_flight) override;
   void PopulateConnectionStats(QuicConnectionStats* /*stats*/) const override {}
-  void CongestionExperienced(QuicPacketCount /*num_ce*/,
-                             QuicPacketCount /*num_ect*/) override {}
   // End implementation of SendAlgorithmInterface.
 
   QuicByteCount min_congestion_window() const { return min_congestion_window_; }

quiche/quic/test_tools/quic_test_utils.h

diff --git a/quiche/quic/test_tools/quic_test_utils.h b/quiche/quic/test_tools/quic_test_utils.h
index 3664b11..9d717df 100644
--- a/quiche/quic/test_tools/quic_test_utils.h
+++ b/quiche/quic/test_tools/quic_test_utils.h
@@ -1243,8 +1243,6 @@
   MOCK_METHOD(void, OnApplicationLimited, (QuicByteCount), (override));
   MOCK_METHOD(void, PopulateConnectionStats, (QuicConnectionStats*),
               (const, override));
-  MOCK_METHOD(void, CongestionExperienced, (QuicPacketCount, QuicPacketCount),
-              (override));
 };
 
 class MockLossAlgorithm : public LossDetectionInterface {