gofix: forgot to rename the URL type

Fixes #2182

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/4952041

src/cmd/gofix/url.go

@@ -27,6 +27,7 @@ func init() {
 }
 
 var urlRenames = []struct{ in, out string }{
+	{"URL", "URL"},
 	{"ParseURL", "Parse"},
 	{"ParseURLReference", "ParseWithReference"},
 	{"ParseQuery", "ParseQuery"},

src/cmd/gofix/url_test.go

@@ -18,6 +18,7 @@ import (
 )
 
 func f() {
+	var _ http.URL
 	http.ParseURL(a)
 	http.ParseURLReference(a)
 	http.ParseQuery(a)
@@ -33,6 +34,7 @@ func f() {
 import "url"
 
 func f() {
+	var _ url.URL
 	url.Parse(a)
 	url.ParseWithReference(a)
 	url.ParseQuery(a)