Remove SSLPrivateKey metadata hooks.

net/ssl/ssl_private_key_test_util.h

Index: net/ssl/ssl_private_key_test_util.h
diff --git a/net/ssl/ssl_private_key_test_util.h b/net/ssl/ssl_private_key_test_util.h
index ff922f7cad54ce4df3fe5d475e1ec9c10c70a0c5..454bbd9c65cc4f55f284c785d67a48b54a52965d 100644
--- a/net/ssl/ssl_private_key_test_util.h
+++ b/net/ssl/ssl_private_key_test_util.h
@@ -7,11 +7,9 @@
 
 #include <string>
 
-#include "net/ssl/ssl_private_key.h"
-
 namespace net {
 
-const char* SSLPrivateKeyTypeToString(SSLPrivateKey::Type type);
+class SSLPrivateKey;
 
 // Tests that |key| matches the private key serialized in |pkcs8|. It checks the
 // reported type and key size are correct, and then it tests all advertised