[refactor] Extract the CertVerifyResult assignment of has_md2, has_md4,

net/cert/cert_verify_proc.h

 // 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.
 
 #ifndef NET_CERT_CERT_VERIFY_PROC_H_
 #define NET_CERT_CERT_VERIFY_PROC_H_
 
 #include <string>
 #include <vector>
 
 #include "base/feature_list.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "net/base/net_export.h"
 #include "net/cert/x509_cert_types.h"
+#include "net/cert/x509_certificate.h"
 
 namespace net {
 
 class CertVerifyResult;
 class CRLSet;
 class X509Certificate;
 typedef std::vector<scoped_refptr<X509Certificate> > CertificateList;
 
 // Class to perform certificate path building and verification for various
 // certificate uses. All methods of this class must be thread-safe, as they
@@ skipping 100 matching lines @@
   // (i.e. by 1 July 2019).
   static bool HasTooLongValidity(const X509Certificate& cert);
 
   // Emergency kill-switch for SHA-1 deprecation. Disabled by default.
   static const base::Feature kSHA1LegacyMode;
   const bool sha1_legacy_mode_enabled;
 
   DISALLOW_COPY_AND_ASSIGN(CertVerifyProc);
 };
 
+// Sets the weak signature hash fields of |verify_result| to true if
+// applicable for |cert|, otherwise does not modify them.
+//
+// The fields in question are: |has_md2|, |has_md4|, |has_md5|,|has_sha1| and
+// |has_sha1_leaf|.
+//
+// Returns the hash algorithm that was determined for |cert|.
+//
+// This function is intended to be used as a helper by platform-specific
+// CertVerifyProc implementations.
+X509Certificate::SignatureHashAlgorithm FillCertVerifyResultWeakSignature(
+    X509Certificate::OSCertHandle cert,
+    bool is_leaf,
+    CertVerifyResult* verify_result);
+
 }  // namespace net
 
 #endif  // NET_CERT_CERT_VERIFY_PROC_H_