Certificate Transparency: Make DNS front-end required.

components/certificate_transparency/single_tree_tracker_unittest.cc

 // Copyright 2016 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 "components/certificate_transparency/single_tree_tracker.h"
 
 #include <string>
 #include <utility>
 
 #include "base/strings/string_piece.h"
@@ skipping 37 matching lines @@
       0x1a, 0x9f, 0x20, 0x79, 0xd0, 0xc1, 0x34, 0x2e, 0x08};
   base::StringPiece sp(reinterpret_cast<const char*>(kOldSTHSignatureData),
                        sizeof(kOldSTHSignatureData));
   return DecodeDigitallySigned(&sp, &(sth->signature)) && sp.empty();
 }
 
 }  // namespace
 
 class SingleTreeTrackerTest : public ::testing::Test {
   void SetUp() override {
-    log_ = net::CTLogVerifier::Create(net::ct::GetTestPublicKey(), "testlog",
-                                      "https://ct.example.com", "");
+    log_ =
+        net::CTLogVerifier::Create(net::ct::GetTestPublicKey(), "testlog",
+                                   "https://ct.example.com", "dns.example.com");
 
     ASSERT_TRUE(log_);
     ASSERT_EQ(log_->key_id(), net::ct::GetTestPublicKeyId());
 
     tree_tracker_.reset(new SingleTreeTracker(log_));
     const std::string der_test_cert(net::ct::GetDerEncodedX509Cert());
     chain_ = net::X509Certificate::CreateFromBytes(der_test_cert.data(),
                                                    der_test_cert.length());
     ASSERT_TRUE(chain_.get());
     net::ct::GetX509CertSCT(&cert_sct_);
@@ skipping 122 matching lines @@
   // Notify of an SCT and make sure it's in the 'pending newer STH' state.
   tree_tracker_->OnSCTVerified(chain_.get(), cert_sct_.get());
 
   // Exactly one value should be logged, indicating the SCT cannot be checked
   // for inclusion as the STH is too old.
   histograms.ExpectTotalCount(kCanCheckForInclusionHistogramName, 1);
   histograms.ExpectBucketCount(kCanCheckForInclusionHistogramName, 1, 1);
 }
 
 }  // namespace certificate_transparency