Use a direct include of strings headers in base/.

base/win/shortcut.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 BASE_WIN_SHORTCUT_H_
 #define BASE_WIN_SHORTCUT_H_
 
 #include <windows.h>
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 
 namespace base {
 namespace win {
 
 enum ShortcutOperation {
   // Create a new shortcut (overwriting if necessary).
   SHORTCUT_CREATE_ALWAYS = 0,
   // Overwrite an existing shortcut (fails if the shortcut doesn't exist).
   // If the arguments are not specified on the new shortcut, keep the old
   // shortcut's arguments.
@@ skipping 111 matching lines @@
 BASE_EXPORT bool TaskbarPinShortcutLink(const wchar_t* shortcut);
 
 // Unpins a shortcut from the Windows 7 taskbar. The shortcut must exist and
 // already be pinned to the taskbar.
 BASE_EXPORT bool TaskbarUnpinShortcutLink(const wchar_t* shortcut);
 
 }  // namespace win
 }  // namespace base
 
 #endif  // BASE_WIN_SHORTCUT_H_