Use a direct include of strings headers in chrome/renderer/.

chrome/renderer/safe_browsing/phishing_url_feature_extractor.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/renderer/safe_browsing/phishing_url_feature_extractor.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/perftimer.h"
-#include "base/string_util.h"
 #include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
 #include "chrome/renderer/safe_browsing/features.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 
 namespace safe_browsing {
 
 PhishingUrlFeatureExtractor::PhishingUrlFeatureExtractor() {}
 
 PhishingUrlFeatureExtractor::~PhishingUrlFeatureExtractor() {}
 
@@ skipping 89 matching lines @@
   // Copy over only the splits that are 3 or more chars long.
   // TODO(bryner): Determine a meaningful min size.
   for (std::vector<std::string>::iterator it = raw_splits.begin();
        it != raw_splits.end(); ++it) {
     if (it->length() >= kMinPathComponentLength)
       tokens->push_back(*it);
   }
 }
 
 }  // namespace safe_browsing