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

chrome/test/webdriver/webdriver_util.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/test/webdriver/webdriver_util.h"
 
 #include "base/base64.h"
 #include "base/basictypes.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/format_macros.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/rand_util.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "base/third_party/icu/icu_utf.h"
 #include "chrome/common/automation_id.h"
 #include "chrome/test/automation/automation_json_requests.h"
 #include "third_party/zlib/google/zip.h"
 
 using base::DictionaryValue;
 using base::ListValue;
 using base::Value;
 
 namespace webdriver {
@@ skipping 517 matching lines @@
 
 bool ValueConversionTraits<webdriver::SkipParsing>::SetFromValue(
     const Value* value, const webdriver::SkipParsing* t) {
   return true;
 }
 
 bool ValueConversionTraits<webdriver::SkipParsing>::CanConvert(
     const Value* value) {
   return true;
 }