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

chrome/test/chromedriver/server/http_handler.cc

 // Copyright (c) 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 "chrome/test/chromedriver/server/http_handler.h"
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
 #include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "chrome/test/chromedriver/chrome/log.h"
 #include "chrome/test/chromedriver/chrome/status.h"
 #include "chrome/test/chromedriver/command_executor.h"
 #include "chrome/test/chromedriver/command_names.h"
 #include "chrome/test/chromedriver/server/http_response.h"
 #include "chrome/test/chromedriver/util.h"
 
 namespace {
 
@@ skipping 381 matching lines @@
         params.SetString(name, path_parts[i]);
     } else if (command_path_parts[i] != path_parts[i]) {
       return false;
     }
   }
   out_params->MergeDictionary(&params);
   return true;
 }
 
 }  // namespace