Use CertificateReportSender error callback to record HPKP UMA metrics

net/url_request/url_request_unittest.cc

 // Copyright (c) 2012 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 <utility>
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
@@ skipping 671 matching lines @@
     : public TransportSecurityState::ReportSender {
  public:
   MockCertificateReportSender() {}
   ~MockCertificateReportSender() override {}
 
   void Send(const GURL& report_uri, const std::string& report) override {
     latest_report_uri_ = report_uri;
     latest_report_ = report;
   }
 
+  void SetErrorCallback(
+      const base::Callback<void(const GURL&, int)>& error_callback) override {}
+
   const GURL& latest_report_uri() { return latest_report_uri_; }
   const std::string& latest_report() { return latest_report_; }
 
  private:
   GURL latest_report_uri_;
   std::string latest_report_;
 };
 
 class TestExperimentalFeaturesNetworkDelegate : public TestNetworkDelegate {
  public:
@@ skipping 9392 matching lines @@
   AddTestInterceptor()->set_main_intercept_job(std::move(job));
 
   req->Start();
   req->Cancel();
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(URLRequestStatus::CANCELED, req->status().status());
   EXPECT_EQ(0, d.received_redirect_count());
 }
 
 }  // namespace net