Use a direct include of strings headers in url/, win8/.

url/url_parse.h

 // 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.
 
 #ifndef URL_URL_PARSE_H_
 #define URL_URL_PARSE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "url/url_export.h"
 
 namespace url_parse {
 
 // Deprecated, but WebKit/WebCore/platform/KURLGooglePrivate.h and
 // KURLGoogle.cpp still rely on this type.
 typedef char16 UTF16Char;
 
 // Component ------------------------------------------------------------------
 
@@ skipping 324 matching lines @@
                                      Component* key,
                                      Component* value);
 URL_EXPORT bool ExtractQueryKeyValue(const char16* url,
                                      Component* query,
                                      Component* key,
                                      Component* value);
 
 }  // namespace url_parse
 
 #endif  // URL_URL_PARSE_H_