Use more scopers.

Change-Id: I34dd0a57efd5435fcdc59a3c7b1ce806bc0cbb3e
Reviewed-on: https://boringssl-review.googlesource.com/21946
Reviewed-by: Steven Valdez <svaldez@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

ssl/ssl_stat.cc

diff --git a/ssl/ssl_stat.cc b/ssl/ssl_stat.cc
index 37e0324..01153e9 100644
--- a/ssl/ssl_stat.cc
+++ b/ssl/ssl_stat.cc
@@ -89,12 +89,12 @@
 
 
 const char *SSL_state_string_long(const SSL *ssl) {
-  if (ssl->s3->hs == NULL) {
+  if (ssl->s3->hs == nullptr) {
     return "SSL negotiation finished successfully";
   }
 
-  return ssl->server ? ssl_server_handshake_state(ssl->s3->hs)
-                     : ssl_client_handshake_state(ssl->s3->hs);
+  return ssl->server ? ssl_server_handshake_state(ssl->s3->hs.get())
+                     : ssl_client_handshake_state(ssl->s3->hs.get());
 }
 
 const char *SSL_state_string(const SSL *ssl) {