Implement SHA-256 fingerprint support

net/base/x509_certificate.h

Index: net/base/x509_certificate.h
===================================================================
--- net/base/x509_certificate.h	(revision 151057)
+++ net/base/x509_certificate.h	(working copy)
@@ -247,10 +247,10 @@
   const base::Time& valid_expiry() const { return valid_expiry_; }
 
   // The fingerprint of this certificate.
-  const SHA1Fingerprint& fingerprint() const { return fingerprint_; }
+  const SHA1HashValue& fingerprint() const { return fingerprint_; }
 
   // The fingerprint of the intermediate CA certificates.
-  const SHA1Fingerprint& ca_fingerprint() const {
+  const SHA1HashValue& ca_fingerprint() const {
     return ca_fingerprint_;
   }
 
@@ -425,11 +425,11 @@
 
   // Calculates the SHA-1 fingerprint of the certificate.  Returns an empty
   // (all zero) fingerprint on failure.
-  static SHA1Fingerprint CalculateFingerprint(OSCertHandle cert_handle);
+  static SHA1HashValue CalculateFingerprint(OSCertHandle cert_handle);
 
   // Calculates the SHA-1 fingerprint of the intermediate CA certificates.
   // Returns an empty (all zero) fingerprint on failure.
-  static SHA1Fingerprint CalculateCAFingerprint(
+  static SHA1HashValue CalculateCAFingerprint(
       const OSCertHandles& intermediates);
 
  private:
@@ -495,10 +495,10 @@
   base::Time valid_expiry_;
 
   // The fingerprint of this certificate.
-  SHA1Fingerprint fingerprint_;
+  SHA1HashValue fingerprint_;
 
   // The fingerprint of the intermediate CA certificates.
-  SHA1Fingerprint ca_fingerprint_;
+  SHA1HashValue ca_fingerprint_;
 
   // The serial number of this certificate, DER encoded.
   std::string serial_number_;