Use a direct include of strings headers in ui/, part 1.

ui/base/ime/win/tsf_text_store.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_BASE_IME_WIN_TSF_TEXT_STORE_H_
 #define UI_BASE_IME_WIN_TSF_TEXT_STORE_H_
 
 #include <msctf.h>
 #include <deque>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "base/win/scoped_comptr.h"
 #include "ui/base/ime/composition_underline.h"
 #include "ui/base/range/range.h"
 #include "ui/base/ui_export.h"
 
 namespace ui {
 class TextInputClient;
 
 // TSFTextStore is used to interact with the input method via TSF manager.
 // TSFTextStore have a string buffer which is manipulated by TSF manager through
@@ skipping 258 matching lines @@
   // attributes of the composition string.
   base::win::ScopedComPtr<ITfCategoryMgr> category_manager_;
   base::win::ScopedComPtr<ITfDisplayAttributeMgr> display_attribute_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(TSFTextStore);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_WIN_TSF_TEXT_STORE_H_