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

net/tools/quic/quic_spdy_client_stream_test.cc

Index: net/tools/quic/quic_spdy_client_stream_test.cc
diff --git a/net/tools/quic/quic_spdy_client_stream_test.cc b/net/tools/quic/quic_spdy_client_stream_test.cc
index b7233dfff89771f87edaaad9908b3aa42e455574..c714086032dfae1c6243cfe7d277f3139c6d693e 100644
--- a/net/tools/quic/quic_spdy_client_stream_test.cc
+++ b/net/tools/quic/quic_spdy_client_stream_test.cc
@@ -38,7 +38,7 @@ class MockQuicClientSession : public QuicClientSession {
             QuicServerId("example.com", 443, PRIVACY_MODE_DISABLED),
             &crypto_config_,
             push_promise_index),
-        crypto_config_(CryptoTestUtils::ProofVerifierForTesting()) {}
+        crypto_config_(crypto_test_utils::ProofVerifierForTesting()) {}
   ~MockQuicClientSession() override {}
 
   MOCK_METHOD1(CloseStream, void(QuicStreamId stream_id));