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

ui/base/win/ime_input.h

 // Copyright (c) 2011 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_BASE_WIN_IME_INPUT_H_
 #define UI_BASE_WIN_IME_INPUT_H_
 
 #include <windows.h>
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/i18n/rtl.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
+#include "ui/base/ui_export.h"
 #include "ui/gfx/rect.h"
-#include "ui/base/ui_export.h"
 
 namespace ui {
 
 struct CompositionText;
 
 // This header file defines a struct and a class used for encapsulating IMM32
 // APIs, controls IMEs attached to a window, and enables the 'on-the-spot'
 // input without deep knowledge about the APIs, i.e. knowledge about the
 // language-specific and IME-specific behaviors.
 // The following items enumerates the simplest steps for an (window)
@@ skipping 282 matching lines @@
 
   // Indicates whether or not we want IME to render composition text.
   bool use_composition_window_;
 
   DISALLOW_COPY_AND_ASSIGN(ImeInput);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_WIN_IME_INPUT_H_