Fix two tests that fail when FLAGS_enable_quic_pacing is enabled

net/quic/quic_config_test.cc

Index: net/quic/quic_config_test.cc
diff --git a/net/quic/quic_config_test.cc b/net/quic/quic_config_test.cc
index 401fa470e3bcdd02b21dafd79cdbedec4aaac217..2434cd772fd3de5ae4caa960b2f30678e14c828a 100644
--- a/net/quic/quic_config_test.cc
+++ b/net/quic/quic_config_test.cc
@@ -29,6 +29,8 @@ class QuicConfigTest : public ::testing::Test {
 };
 
 TEST_F(QuicConfigTest, ToHandshakeMessage) {
+  FLAGS_enable_quic_pacing = false;
+  config_.SetDefaults();
   config_.set_idle_connection_state_lifetime(QuicTime::Delta::FromSeconds(5),
                                              QuicTime::Delta::FromSeconds(2));
   config_.set_max_streams_per_connection(4, 2);