IWYU fixes for url/...

url/url_canon_path.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 <limits.h>
 
 #include "base/logging.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_parse_internal.h"
 
 namespace url {
 
 namespace {
 
 enum CharacterFlags {
   // Pass through unchanged, whether escaped or unescaped. This doesn't
@@ skipping 410 matching lines @@
 bool CanonicalizePartialPath(const base::char16* spec,
                              const Component& path,
                              int path_begin_in_output,
                              CanonOutput* output) {
   return DoPartialPath<base::char16, base::char16>(spec, path,
                                                    path_begin_in_output,
                                                    output);
 }
 
 }  // namespace url