Rollback FLAGS_enable_quic_connection_flow_control due to bug in latest

net/quic/quic_flags.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/quic_flags.h"
 
 // TODO(rtenneti): Remove this.
 // Do not flip this flag until the flakiness of the
 // net/tools/quic/end_to_end_test is fixed.
 // If true, then QUIC connections will track the retransmission history of a
@@ skipping 12 matching lines @@
 // If true, turns on stream flow control in QUIC.
 // If this is disabled, all in flight QUIC connections talking QUIC_VERSION_17
 // or higher will timeout. New connections will be fine.
 // If disabling this flag, also disable enable_quic_connection_flow_control.
 bool FLAGS_enable_quic_stream_flow_control_2 = true;
 
 // Do not remove this flag until b/11792453 is marked as Fixed.
 // If true, turns on connection level flow control in QUIC.
 // If this is disabled, all in flight QUIC connections talking QUIC_VERSION_19
 // or higher will timeout. New connections will be fine.
-bool FLAGS_enable_quic_connection_flow_control = true;
+// Disabled due to b/15084203.
+bool FLAGS_enable_quic_connection_flow_control = false;
 
 bool FLAGS_quic_allow_oversized_packets_for_test = false;
 
 // When true, the use time based loss detection instead of nack.
 bool FLAGS_quic_use_time_loss_detection = false;
 
 // If true, allow peer port migration of established QUIC connections.
 bool FLAGS_quic_allow_port_migration = true;