crypto: move _impl call out of handleError funct

This commit moves the _impl function call out of the handleError
function, which now only takes in an object as its parameter.

PR-URL: #28318
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: danbev

lib/internal/crypto/keygen.js

@@ -60,7 +60,7 @@ function generateKeyPair(type, options, callback) {
     callback.call(wrap, null, pubkey, privkey);
   };
 
-  handleError(impl, wrap);
+  handleError(impl(wrap));
 }
 
 Object.defineProperty(generateKeyPair, customPromisifyArgs, {
@@ -70,11 +70,10 @@ Object.defineProperty(generateKeyPair, customPromisifyArgs, {
 
 function generateKeyPairSync(type, options) {
   const impl = check(type, options);
-  return handleError(impl);
+  return handleError(impl());
 }
 
-function handleError(impl, wrap) {
-  const ret = impl(wrap);
+function handleError(ret) {
   if (ret === undefined)
     return; // async