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

ui/views/corewm/native_cursor_manager.h

 // Copyright (c) 2013 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_COREWM_NATIVE_CURSOR_MANAGER_H_
 #define UI_VIEWS_COREWM_NATIVE_CURSOR_MANAGER_H_
 
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "ui/views/corewm/native_cursor_manager_delegate.h"
 #include "ui/views/views_export.h"
 
 namespace gfx {
 class Display;
 }
 
 namespace views {
 namespace corewm {
 
@@ skipping 38 matching lines @@
 
   // Used to pass the cursor resource module name to the cursor loader. This is
   // typically used to load non system cursors.
   virtual void SetCursorResourceModule(const string16& module_name) = 0;
 };
 
 }  // namespace corewm
 }  // namespace views
 
 #endif  // UI_VIEWS_COREWM_NATIVE_CURSOR_MANAGER_H_