Use a direct include of strings headers in ui/, part 3.

ui/views/controls/textfield/native_textfield_win.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_WIN_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_WIN_H_
 
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlcrack.h>
 #include <atlctrls.h>
 #include <atlmisc.h>
 #include <oleacc.h>
 #include <tom.h>  // For ITextDocument, a COM interface to CRichEditCtrl
 #include <vsstyle.h>
 
 #include "base/memory/scoped_ptr.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "base/win/scoped_comptr.h"
+#include "ui/base/ime/win/tsf_event_router.h"
 #include "ui/base/models/simple_menu_model.h"
-#include "ui/base/ime/win/tsf_event_router.h"
+#include "ui/base/win/extra_sdk_defines.h"
 #include "ui/gfx/insets.h"
-#include "ui/base/win/extra_sdk_defines.h"
 #include "ui/views/controls/textfield/native_textfield_wrapper.h"
 
 namespace views {
 
 class MenuRunner;
 class NativeViewHost;
 class Textfield;
 
 static const int kDefaultEditStyle = WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN |
     WS_CLIPSIBLINGS;
@@ skipping 285 matching lines @@
   int accessibility_state_;
 
   scoped_ptr<ui::TSFEventRouter> tsf_event_router_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeTextfieldWin);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_WIN_H_