IWYU fixes for url/...

url/url_parse_file.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.
 
 #include "base/logging.h"
+#include "base/strings/string16.h"
 #include "url/third_party/mozilla/url_parse.h"
 #include "url/url_file.h"
 #include "url/url_parse_internal.h"
 
 // Interesting IE file:isms...
 //
 //  INPUT                      OUTPUT
 //  =========================  ==============================
 //  file:/foo/bar              file:///foo/bar
 //      The result here seems totally invalid!?!? This isn't UNC.
@@ skipping 197 matching lines @@
 
 void ParseFileURL(const char* url, int url_len, Parsed* parsed) {
   DoParseFileURL(url, url_len, parsed);
 }
 
 void ParseFileURL(const base::char16* url, int url_len, Parsed* parsed) {
   DoParseFileURL(url, url_len, parsed);
 }
 
 }  // namespace url