Use new BoringSSL scopers in //crypto

net/ssl/token_binding.h

Index: net/ssl/token_binding.h
diff --git a/net/ssl/token_binding.h b/net/ssl/token_binding.h
index 94000930a072d6154f94346650c35b91599a60a3..445e4d6f4dd99ae87be0fb7b7a81e1996e471c3c 100644
--- a/net/ssl/token_binding.h
+++ b/net/ssl/token_binding.h
@@ -9,10 +9,13 @@
 #include <vector>
 
 #include "base/strings/string_piece.h"
-#include "crypto/ec_private_key.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_export.h"
 
+namespace crypto {
+class ECPrivateKey;
+}
+
 namespace net {
 
 enum class TokenBindingType {