Support SHA-256 in public key pins for HTTPS.

net/base/ssl_info.cc

Index: net/base/ssl_info.cc
===================================================================
--- net/base/ssl_info.cc	(revision 148967)
+++ net/base/ssl_info.cc	(working copy)
@@ -30,6 +30,7 @@
   channel_id_sent = info.channel_id_sent;
   handshake_type = info.handshake_type;
   public_key_hashes = info.public_key_hashes;
+
   return *this;
 }
 
@@ -42,7 +43,13 @@
   client_cert_sent = false;
   channel_id_sent = false;
   handshake_type = HANDSHAKE_UNKNOWN;
+
   public_key_hashes.clear();
+  public_key_hashes.reserve(FINGERPRINT_TAGS_COUNT);
+  HashValueVector sha1s;
+  public_key_hashes.push_back(sha1s);
+  HashValueVector sha256s;
+  public_key_hashes.push_back(sha256s);
 }
 
 void SSLInfo::SetCertError(int error) {