Allow QUIC pacing and time-based loss detection to be enabled via

net/quic/test_tools/quic_config_peer.cc

Index: net/quic/test_tools/quic_config_peer.cc
diff --git a/net/quic/test_tools/quic_config_peer.cc b/net/quic/test_tools/quic_config_peer.cc
index 798209c18558dc5fe51ffae3c2a96fc0c72c5a32..da5e9c806200c472a24d98e49e0d98b62131754f 100644
--- a/net/quic/test_tools/quic_config_peer.cc
+++ b/net/quic/test_tools/quic_config_peer.cc
@@ -41,5 +41,11 @@ void QuicConfigPeer::SetReceivedInitialSessionFlowControlWindow(
       window_bytes);
 }
 
+// static
+void QuicConfigPeer::SetReceivedCongestionOptions(QuicConfig* config,
+                                                  const QuicTagVector options) {
+  config->congestion_options_.SetReceivedValues(options);
+}
+
 }  // namespace test
 }  // namespace net