Convert class-full-of-statics CryptoTestUtils into a namespace

net/quic/core/quic_server_session_base_test.cc

Index: net/quic/core/quic_server_session_base_test.cc
diff --git a/net/quic/core/quic_server_session_base_test.cc b/net/quic/core/quic_server_session_base_test.cc
index 09c9c28ee5850e2de277ff145e7ee7939fc53af4..ac567722035755bd1bddd3e0f58f914f9a671f23 100644
--- a/net/quic/core/quic_server_session_base_test.cc
+++ b/net/quic/core/quic_server_session_base_test.cc
@@ -120,7 +120,7 @@ const size_t kMaxStreamsForTest = 10;
 class QuicServerSessionBaseTest : public ::testing::TestWithParam<QuicVersion> {
  protected:
   QuicServerSessionBaseTest()
-      : QuicServerSessionBaseTest(CryptoTestUtils::ProofSourceForTesting()) {}
+      : QuicServerSessionBaseTest(crypto_test_utils::ProofSourceForTesting()) {}
 
   explicit QuicServerSessionBaseTest(std::unique_ptr<ProofSource> proof_source)
       : crypto_config_(QuicCryptoServerConfig::TESTING,
@@ -609,7 +609,7 @@ TEST_P(StreamMemberLifetimeTest, Basic) {
 
   const QuicClock* clock = helper_.GetClock();
   QuicVersion version = AllSupportedVersions().front();
-  CryptoHandshakeMessage chlo = CryptoTestUtils::GenerateDefaultInchoateCHLO(
+  CryptoHandshakeMessage chlo = crypto_test_utils::GenerateDefaultInchoateCHLO(
       clock, version, &crypto_config_);
   chlo.SetVector(kCOPT, QuicTagVector{kSREJ});
   std::vector<QuicVersion> packet_version_list = {version};