Use a direct include of strings headers in chrome_frame/.

chrome_frame/test/perf/chrome_frame_perftest.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_frame/test/perf/chrome_frame_perftest.h"
 
 #include <atlwin.h>
 #include <atlhost.h>
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/debug/trace_event_win.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/test_file_util.h"
 #include "base/threading/platform_thread.h"
 #include "base/time.h"
 #include "base/win/event_trace_consumer.h"
 #include "base/win/event_trace_controller.h"
 #include "base/win/registry.h"
 #include "base/win/scoped_bstr.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/scoped_variant.h"
@@ skipping 1567 matching lines @@
   PrintPerfTestResults(automation_provider_connect_monitor, kNumCycles,
                        "automationproviderconnect");
   PrintPerfTestResults(external_tab_navigate_monitor, kNumCycles,
                        "externaltabnavigate");
   PrintPerfTestResults(renderer_main_monitor, kNumCycles,
                        "beginrenderermain");
 #ifdef NDEBUG
   PrintPerfTestResults(pre_read_chrome_monitor, kNumCycles, "PreReadImage");
 #endif  // NDEBUG
 }