Support SHA-256 in public key pins for HTTPS.

net/base/cert_verify_proc_mac.cc

Index: net/base/cert_verify_proc_mac.cc
===================================================================
--- net/base/cert_verify_proc_mac.cc	(revision 142157)
+++ net/base/cert_verify_proc_mac.cc	(working copy)
@@ -231,7 +231,7 @@
 }
 
 void AppendPublicKeyHashes(CFArrayRef chain,
-                           std::vector<SHA1Fingerprint>* hashes) {
+                           std::vector<Fingerprint>* hashes) {
   const CFIndex n = CFArrayGetCount(chain);
   for (CFIndex i = 0; i < n; i++) {
     SecCertificateRef cert = reinterpret_cast<SecCertificateRef>(
@@ -246,8 +246,9 @@
     if (!asn1::ExtractSPKIFromDERCert(der_bytes, &spki_bytes))
       continue;
 
-    SHA1Fingerprint hash;
-    CC_SHA1(spki_bytes.data(), spki_bytes.size(), hash.data);
+    Fingerprint hash;
+    hash.tag = FINGERPRINT_SHA1;
+    CC_SHA1(spki_bytes.data(), spki_bytes.size(), hash.data());
     hashes->push_back(hash);
   }
 }