url: fix permanent deoptimizations

PR-URL: https://github.com/nodejs/node/pull/12456
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/internal/url.js

@@ -232,9 +232,9 @@ class URL {
     if (typeof depth === 'number' && depth < 0)
       return opts.stylize('[Object]', 'special');
 
-    const ctor = getConstructorOf(this);
+    var ctor = getConstructorOf(this);
 
-    const obj = Object.create({
+    var obj = Object.create({
       constructor: ctor === null ? URL : ctor
     });
 
@@ -879,20 +879,20 @@ class URLSearchParams {
     if (typeof recurseTimes === 'number' && recurseTimes < 0)
       return ctx.stylize('[Object]', 'special');
 
-    const separator = ', ';
-    const innerOpts = Object.assign({}, ctx);
+    var separator = ', ';
+    var innerOpts = Object.assign({}, ctx);
     if (recurseTimes !== null) {
       innerOpts.depth = recurseTimes - 1;
     }
-    const innerInspect = (v) => util.inspect(v, innerOpts);
+    var innerInspect = (v) => util.inspect(v, innerOpts);
 
-    const list = this[searchParams];
-    const output = [];
+    var list = this[searchParams];
+    var output = [];
     for (var i = 0; i < list.length; i += 2)
       output.push(`${innerInspect(list[i])} => ${innerInspect(list[i + 1])}`);
 
-    const colorRe = /\u001b\[\d\d?m/g;
-    const length = output.reduce(
+    var colorRe = /\u001b\[\d\d?m/g;
+    var length = output.reduce(
       (prev, cur) => prev + cur.replace(colorRe, '').length + separator.length,
       -separator.length
     );