Refactor X509Certificate caching to cache the OS handle, rather than the X509Certificate

net/socket/ssl_client_socket_openssl.cc

Index: net/socket/ssl_client_socket_openssl.cc
diff --git a/net/socket/ssl_client_socket_openssl.cc b/net/socket/ssl_client_socket_openssl.cc
index 3e25e2bb2b3877b8f208d33f5028c05451c58581..f679bcc385c4648751af130146762f22cd7b2a4d 100644
--- a/net/socket/ssl_client_socket_openssl.cc
+++ b/net/socket/ssl_client_socket_openssl.cc
@@ -869,8 +869,7 @@ X509Certificate* SSLClientSocketOpenSSL::UpdateServerCert() {
     for (int i = 0; i < sk_X509_num(chain); ++i)
       intermediates.push_back(sk_X509_value(chain, i));
   }
-  server_cert_ = X509Certificate::CreateFromHandle(
-      cert.get(), X509Certificate::SOURCE_FROM_NETWORK, intermediates);
+  server_cert_ = X509Certificate::CreateFromHandle(cert.get(), intermediates);
   DCHECK(server_cert_);
 
   return server_cert_;