Parameterize the CertVerifyProc tests so they can be run with

net/cert/cert_verify_proc_ios.h

 // Copyright (c) 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.
 
 #ifndef NET_CERT_CERT_VERIFY_PROC_IOS_H_
 #define NET_CERT_CERT_VERIFY_PROC_IOS_H_
 
+#include "net/base/net_export.h"
 #include "net/cert/cert_verify_proc.h"
 
 #include <Security/Security.h>
 
 namespace net {
 
 // Performs certificate path construction and validation using iOS's
 // Security.framework.
-class CertVerifyProcIOS : public CertVerifyProc {
+class NET_EXPORT_PRIVATE CertVerifyProcIOS : public CertVerifyProc {
  public:
   CertVerifyProcIOS();
 
   // Returns error CertStatus from the given |trust| object. Returns
   // CERT_STATUS_INVALID if the trust is null.
   static CertStatus GetCertFailureStatusFromTrust(SecTrustRef trust);
 
   bool SupportsAdditionalTrustAnchors() const override;
   bool SupportsOCSPStapling() const override;
 
  protected:
   ~CertVerifyProcIOS() override;
 
  private:
   int VerifyInternal(X509Certificate* cert,
                      const std::string& hostname,
                      const std::string& ocsp_response,
                      int flags,
                      CRLSet* crl_set,
                      const CertificateList& additional_trust_anchors,
                      CertVerifyResult* verify_result) override;
 };
 
 }  // namespace net
 
 #endif  // NET_CERT_CERT_VERIFY_PROC_IOS_H_