Make a number unsigned in order to compile in Chromium

gfe-relnote: N/A test only.
PiperOrigin-RevId: 244181085
Change-Id: Ib9a5d71aff17112adc4deb15eea5413af5a51cf1

quic/core/crypto/transport_parameters_test.cc

diff --git a/quic/core/crypto/transport_parameters_test.cc b/quic/core/crypto/transport_parameters_test.cc
index 4a7c9e7..6822a5b 100644
--- a/quic/core/crypto/transport_parameters_test.cc
+++ b/quic/core/crypto/transport_parameters_test.cc
@@ -484,7 +484,7 @@
 
   EXPECT_EQ(Perspective::IS_SERVER, new_params.perspective);
   EXPECT_EQ(kFakeVersionLabel, new_params.version);
-  EXPECT_EQ(2, new_params.supported_versions.size());
+  EXPECT_EQ(2u, new_params.supported_versions.size());
   EXPECT_EQ(kFakeVersionLabel, new_params.supported_versions[0]);
   EXPECT_EQ(kFakeVersionLabel2, new_params.supported_versions[1]);
   EXPECT_EQ(kFakeOriginalConnectionId, new_params.original_connection_id);