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

ui/views/examples/table_example.cc

 // 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.
 
 #include "ui/views/examples/table_example.h"
 
 #include <vector>
 
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/controls/button/checkbox.h"
 #include "ui/views/layout/grid_layout.h"
 
 namespace views {
 namespace examples {
 
@@ skipping 151 matching lines @@
     show = column3_visible_checkbox_->checked();
   } else if (sender == column4_visible_checkbox_) {
     index = 3;
     show = column4_visible_checkbox_->checked();
   }
   table_->SetColumnVisibility(index, show);
 }
 
 }  // namespace examples
 }  // namespace views