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

chrome/test/chromedriver/chrome/web_view_impl.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/chrome/web_view_impl.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "base/threading/platform_thread.h"
 #include "base/time.h"
 #include "base/values.h"
 #include "chrome/test/chromedriver/chrome/devtools_client_impl.h"
 #include "chrome/test/chromedriver/chrome/dom_tracker.h"
 #include "chrome/test/chromedriver/chrome/frame_tracker.h"
 #include "chrome/test/chromedriver/chrome/geolocation_override_manager.h"
 #include "chrome/test/chromedriver/chrome/javascript_dialog_manager.h"
 #include "chrome/test/chromedriver/chrome/js.h"
 #include "chrome/test/chromedriver/chrome/log.h"
@@ skipping 550 matching lines @@
   if (status.IsError())
     return status;
 
   if (!cmd_result->GetInteger("nodeId", node_id))
     return Status(kUnknownError, "DOM.requestNode missing int 'nodeId'");
   *found_node = true;
   return Status(kOk);
 }
 
 }  // namespace internal