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

net/tools/quic/quic_client_test.cc

Index: net/tools/quic/quic_client_test.cc
diff --git a/net/tools/quic/quic_client_test.cc b/net/tools/quic/quic_client_test.cc
index 1037aedc62ffbd5faa52639239632c300fa60e71..313c23f3d8c0fb2e12c84a1310858d3c3e92ae5e 100644
--- a/net/tools/quic/quic_client_test.cc
+++ b/net/tools/quic/quic_client_test.cc
@@ -55,7 +55,7 @@ QuicClient* CreateAndInitializeQuicClient(EpollServer* eps, uint16_t port) {
   QuicVersionVector versions = AllSupportedVersions();
   QuicClient* client =
       new QuicClient(server_address, server_id, versions, eps,
-                     CryptoTestUtils::ProofVerifierForTesting());
+                     crypto_test_utils::ProofVerifierForTesting());
   EXPECT_TRUE(client->Initialize());
   return client;
 }
@@ -66,7 +66,7 @@ TEST(QuicClientTest, DoNotLeakFDs) {
 
   // Create a ProofVerifier before counting the number of open FDs to work
   // around some ASAN weirdness.
-  CryptoTestUtils::ProofVerifierForTesting().reset();
+  crypto_test_utils::ProofVerifierForTesting().reset();
 
   // Make sure that the QuicClient doesn't leak FDs. Doing so could cause port
   // exhaustion in long running processes which repeatedly create clients.
@@ -93,7 +93,7 @@ TEST(QuicClientTest, DoNotLeakFDs) {
 TEST(QuicClientTest, CreateAndCleanUpUDPSockets) {
   // Create a ProofVerifier before counting the number of open FDs to work
   // around some ASAN weirdness.
-  CryptoTestUtils::ProofVerifierForTesting().reset();
+  crypto_test_utils::ProofVerifierForTesting().reset();
 
   EpollServer eps;
   size_t number_of_open_fds = NumOpenSocketFDs();