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

chrome/app/delay_load_hook_win.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/app/delay_load_hook_win.h"
 
 #if defined(_WIN32_WINNT_WIN8) && _MSC_VER < 1700
 // The Windows 8 SDK defines FACILITY_VISUALCPP in winerror.h, and in
 // delayimp.h previous to VS2012.
 #undef FACILITY_VISUALCPP
 #endif
 #include <DelayIMP.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"
 
 // So long as these symbols are supplied to the final binary through an
 // object file (as opposed to indirectly through a library), these pointers
 // will override the CRT's symbols and direct the notifications to our hook.
 // Alternatively referencing the ChromeDelayLoadHook function somehow will
 // cause this declaration of these variables to take preference to the delay
 // load runtime's defaults (in delayimp.lib).
 PfnDliHook __pfnDliNotifyHook2 = ChromeDelayLoadHook;
 PfnDliHook __pfnDliFailureHook2 = ChromeDelayLoadHook;
 
@@ skipping 49 matching lines @@
 
     default:
       NOTREACHED() << "Impossible delay load notification.";
       break;
   }
 
   // Returning NULL causes the delay load machinery to perform default
   // processing for this notification.
   return NULL;
 }