Deprecate --gfe2_reloadable_flag_quic_fix_bbr_cwnd_in_bandwidth_resumption.

PiperOrigin-RevId: 320977172
Change-Id: I84ef1d6e140e2dffcef15bf2307c1f7f1926f507

quic/core/congestion_control/bbr_sender_test.cc

diff --git a/quic/core/congestion_control/bbr_sender_test.cc b/quic/core/congestion_control/bbr_sender_test.cc
index c947568..8994c29 100644
--- a/quic/core/congestion_control/bbr_sender_test.cc
+++ b/quic/core/congestion_control/bbr_sender_test.cc
@@ -115,7 +115,6 @@
   }
 
   void SetUp() override {
-    SetQuicReloadableFlag(quic_fix_bbr_cwnd_in_bandwidth_resumption, true);
     SetQuicReloadableFlag(quic_bbr_donot_inject_bandwidth, true);
     if (GetQuicFlag(FLAGS_quic_bbr_test_regression_mode) == "regress") {
       SendAlgorithmTestResult expected;

quic/core/congestion_control/send_algorithm_interface.h

diff --git a/quic/core/congestion_control/send_algorithm_interface.h b/quic/core/congestion_control/send_algorithm_interface.h
index a8d2afa..aed7d98 100644
--- a/quic/core/congestion_control/send_algorithm_interface.h
+++ b/quic/core/congestion_control/send_algorithm_interface.h
@@ -42,8 +42,6 @@
         : bandwidth(bandwidth),
           rtt(rtt),
           allow_cwnd_to_decrease(allow_cwnd_to_decrease),
-          quic_fix_bbr_cwnd_in_bandwidth_resumption(
-              GetQuicReloadableFlag(quic_fix_bbr_cwnd_in_bandwidth_resumption)),
           quic_bbr_donot_inject_bandwidth(
               GetQuicReloadableFlag(quic_bbr_donot_inject_bandwidth)) {}
 
@@ -62,7 +60,7 @@
     bool allow_cwnd_to_decrease;
     // Code changes that are controlled by flags.
     // TODO(b/131899599): Remove after impact of fix is measured.
-    bool quic_fix_bbr_cwnd_in_bandwidth_resumption;
+    bool quic_fix_bbr_cwnd_in_bandwidth_resumption = true;
     // TODO(b/143540157): Remove after impact of fix is measured.
     bool quic_bbr_fix_pacing_rate = true;
     // TODO(b/72089315, b/143891040): Remove after impact of fix is measured.