Use a direct include of strings headers in chrome/auto*/.

chrome/browser/autocomplete/url_prefix.cc

 // Copyright (c) 2012 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 "chrome/browser/autocomplete/url_prefix.h"
 
 #include "base/basictypes.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 
 URLPrefix::URLPrefix(const string16& prefix, size_t num_components)
     : prefix(prefix),
       num_components(num_components) {
 }
 
 // static
 const URLPrefixes& URLPrefix::GetURLPrefixes() {
   CR_DEFINE_STATIC_LOCAL(URLPrefixes, prefixes, ());
@@ skipping 21 matching lines @@
 
 // static
 const URLPrefix* URLPrefix::BestURLPrefix(const string16& text,
                                           const string16& prefix_suffix) {
   const URLPrefixes& list = GetURLPrefixes();
   for (URLPrefixes::const_iterator i = list.begin(); i != list.end(); ++i)
     if (StartsWith(text, i->prefix + prefix_suffix, false))
       return &(*i);
   return NULL;
 }