IWYU fixes for url/...

url/url_canon_mailtourl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Functions for canonicalizing "mailto:" URLs.
 
+#include <stddef.h>
+
+#include "base/strings/string16.h"
+#include "url/third_party/mozilla/url_parse.h"
 #include "url/url_canon.h"
 #include "url/url_canon_internal.h"
-#include "url/url_file.h"
-#include "url/url_parse_internal.h"
 
 namespace url {
 
 namespace {
 
 template <typename CHAR, typename UCHAR>
 bool DoCanonicalizeMailtoURL(const URLComponentSource<CHAR>& source,
                              const Parsed& parsed,
                              CanonOutput* output,
                              Parsed* new_parsed) {
@@ skipping 80 matching lines @@
                       Parsed* new_parsed) {
   RawCanonOutput<1024> utf8;
   URLComponentSource<char> source(base);
   Parsed parsed(base_parsed);
   SetupUTF16OverrideComponents(base, replacements, &utf8, &source, &parsed);
   return DoCanonicalizeMailtoURL<char, unsigned char>(
       source, parsed, output, new_parsed);
 }
 
 }  // namespace url