Use a direct include of strings headers in chrome/browser/chromeos/.

chrome/browser/chromeos/login/default_user_images.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/browser/chromeos/login/default_user_images.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace chromeos {
 
 namespace {
 
@@ skipping 253 matching lines @@
 int GetDefaultImageHistogramValue(int index) {
   DCHECK(index >= 0 && index < kDefaultImagesCount);
   // Create a gap in histogram values for
   // [kHistogramImageFromCamera..kHistogramImageFromProfile] block to fit.
   if (index < kHistogramImageFromCamera)
     return index;
   return index + 6;
 }
 
 }  // namespace chromeos