Use a direct include of strings headers in chrome_frame/.

chrome_frame/chrome_launcher_utils.cc

 // Copyright (c) 2011 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_frame/chrome_launcher_utils.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/win/windows_version.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome_frame/chrome_frame_automation.h"
 #include "chrome_frame/policy_settings.h"
 
 namespace {
 
 const char kUpdateCommandFlag[] = "--update-cmd";
 
@@ skipping 76 matching lines @@
   // instead.
   if (!file_util::PathExists(cur_path)) {
     PathService::Get(base::DIR_MODULE, &cur_path);
     cur_path = cur_path.DirName().Append(chrome::kBrowserProcessExecutableName);
   }
 
   return cur_path;
 }
 
 }  // namespace chrome_launcher