Fixed integer signing bug in cubic bytes/packet implementation

net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc

Index: net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
diff --git a/net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc b/net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
index f793211849784a7ef7a9142aeb7a71addbf60a7c..0f914b2847950114ad0d9384b6a37b4540e1712a 100644
--- a/net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
+++ b/net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
@@ -47,6 +47,16 @@ TcpCubicSenderBytes::TcpCubicSenderBytes(
 
 TcpCubicSenderBytes::~TcpCubicSenderBytes() {}
 
+void TcpCubicSenderBytes::SetFromConfig(const QuicConfig& config,
+                                        Perspective perspective) {
+  TcpCubicSenderBase::SetFromConfig(config, perspective);
+  if (FLAGS_quic_fix_cubic_convex_mode &&
+      config.HasReceivedConnectionOptions() &&
+      ContainsQuicTag(config.ReceivedConnectionOptions(), kCCVX)) {
+    cubic_.SetFixConvexMode(true);
+  }
+}
+
 void TcpCubicSenderBytes::SetCongestionWindowFromBandwidthAndRtt(
     QuicBandwidth bandwidth,
     QuicTime::Delta rtt) {