Add a new CryptoTestUtils::LeafCertHashForTesting for generating expected leaf cert hashes.

net/quic/crypto/crypto_server_test.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <cstdint>
 #include <memory>
 #include <ostream>
 #include <vector>
 
@@ skipping 350 matching lines @@
       ASSERT_EQ(kREJ, out_.tag()) << QuicUtils::TagToString(out_.tag());
     }
   }
 
   bool RejectsAreStateless() {
     return GetParam().enable_stateless_rejects &&
            GetParam().use_stateless_rejects;
   }
 
   string XlctHexString() {
-    scoped_refptr<ProofSource::Chain> chain;
-    IPAddress server_ip;
-    string sig;
-    string cert_sct;
-    std::unique_ptr<ProofSource> proof_source(
-        CryptoTestUtils::ProofSourceForTesting());
-    if (!proof_source->GetProof(server_ip, "", "", client_version_, "", false,
-                                &chain, &sig, &cert_sct) ||
-        chain->certs.empty()) {
-      return "#0100000000000000";
-    }
-
-    std::ostringstream xlct_stream;
-    uint64_t xlct = QuicUtils::FNV1a_64_Hash(chain->certs.at(0).c_str(),
-                                             chain->certs.at(0).length());
+    uint64_t xlct = CryptoTestUtils::LeafCertHashForTesting();
     return "#" +
            QuicUtils::HexEncode(reinterpret_cast<char*>(&xlct), sizeof(xlct));
   }
 
  protected:
   QuicRandom* const rand_;
   MockRandom rand_for_id_generation_;
   MockClock clock_;
   IPEndPoint client_address_;
   QuicVersionVector supported_versions_;
@@ skipping 793 matching lines @@
 
   strike_register_client_->RunPendingVerifications();
   ASSERT_TRUE(called);
   EXPECT_EQ(0, strike_register_client_->PendingVerifications());
   // The message should be rejected now.
   CheckRejectTag();
 }
 
 }  // namespace test
 }  // namespace net