Use a direct include of strings headers in chromeos/.

chromeos/display/output_util.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 "chromeos/display/output_util.h"
 
 #include <X11/Xlib.h>
 #include <X11/extensions/Xrandr.h>
 #include <X11/Xatom.h>
 
 #include "base/hash.h"
 #include "base/message_loop.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/sys_byteorder.h"
 
 namespace chromeos {
 namespace {
 
 // Prefixes for the built-in displays.
 const char kInternal_LVDS[] = "LVDS";
 const char kInternal_eDP[] = "eDP";
 
 // Returns 64-bit persistent ID for the specified manufacturer's ID and
@@ skipping 294 matching lines @@
   }
 
   return false;
 }
 
 bool IsInternalOutputName(const std::string& name) {
   return name.find(kInternal_LVDS) == 0 || name.find(kInternal_eDP) == 0;
 }
 
 }  // namespace chromeos