Replace va_arg version of crypto_test_utils::Message with a more modern vector argument version.

net/quic/test_tools/crypto_test_utils_test.cc

Index: net/quic/test_tools/crypto_test_utils_test.cc
diff --git a/net/quic/test_tools/crypto_test_utils_test.cc b/net/quic/test_tools/crypto_test_utils_test.cc
index d2b4524ae2e8c481a7780cb00daab372f0e0d377..2349f1f9c5154e2c5fb1f6f601fe8999587aa8eb 100644
--- a/net/quic/test_tools/crypto_test_utils_test.cc
+++ b/net/quic/test_tools/crypto_test_utils_test.cc
@@ -148,19 +148,15 @@ TEST(CryptoTestUtilsTest, TestGenerateFullCHLO) {
       "#" + QuicTextUtils::HexEncode(public_value, sizeof(public_value));
 
   QuicVersion version(AllSupportedVersions().front());
-  // clang-format off
-  CryptoHandshakeMessage inchoate_chlo = crypto_test_utils::Message(
-    "CHLO",
-    "PDMD", "X509",
-    "AEAD", "AESG",
-    "KEXS", "C255",
-    "COPT", "SREJ",
-    "PUBS", pub_hex.c_str(),
-    "NONC", nonce_hex.c_str(),
-    "VER\0", QuicTagToString(QuicVersionToQuicTag(version)).c_str(),
-    "$padding", static_cast<int>(kClientHelloMinimumSize),
-    nullptr);
-  // clang-format on
+  CryptoHandshakeMessage inchoate_chlo = crypto_test_utils::CreateCHLO(
+      {{"PDMD", "X509"},
+       {"AEAD", "AESG"},
+       {"KEXS", "C255"},
+       {"COPT", "SREJ"},
+       {"PUBS", pub_hex},
+       {"NONC", nonce_hex},
+       {"VER\0", QuicTagToString(QuicVersionToQuicTag(version))}},
+      kClientHelloMinimumSize);
 
   crypto_test_utils::GenerateFullCHLO(
       inchoate_chlo, &crypto_config, server_addr, client_addr, version, &clock,