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

chrome/test/chromedriver/element_commands.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/element_commands.h"
 
 #include <list>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
-#include "base/stringprintf.h"
 #include "base/strings/string_split.h"
+#include "base/strings/stringprintf.h"
 #include "base/threading/platform_thread.h"
 #include "base/time.h"
 #include "base/values.h"
 #include "chrome/test/chromedriver/basic_types.h"
 #include "chrome/test/chromedriver/chrome/chrome.h"
 #include "chrome/test/chromedriver/chrome/js.h"
 #include "chrome/test/chromedriver/chrome/status.h"
 #include "chrome/test/chromedriver/chrome/ui_events.h"
 #include "chrome/test/chromedriver/chrome/web_view.h"
 #include "chrome/test/chromedriver/element_util.h"
@@ skipping 410 matching lines @@
     WebView* web_view,
     const std::string& element_id,
     const base::DictionaryValue& params,
     scoped_ptr<base::Value>* value) {
   std::string other_element_id;
   if (!params.GetString("other", &other_element_id))
     return Status(kUnknownError, "'other' must be a string");
   value->reset(new base::FundamentalValue(element_id == other_element_id));
   return Status(kOk);
 }