Use a direct include of strings headers in ui/, part 2.

ui/oak/oak_aura_window_display.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 "ui/oak/oak_aura_window_display.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"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/aura/window.h"
 #include "ui/base/models/table_model_observer.h"
 #include "ui/oak/oak_pretty_print.h"
 
 namespace oak {
 namespace internal {
 namespace {
 enum {
 ROW_ID = 0,
@@ skipping 135 matching lines @@
   }
   return EmptyString16();
 }
 
 void OakAuraWindowDisplay::SetObserver(ui::TableModelObserver* observer) {
   observer_ = observer;
 }
 
 }  // namespace internal
 }  // namespace oak