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

ui/views/controls/styled_label.h

 // Copyright 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_CONTROLS_STYLED_LABEL_H_
 #define UI_VIEWS_CONTROLS_STYLED_LABEL_H_
 
 #include <map>
 #include <queue>
 
 #include "base/basictypes.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "ui/base/range/range.h"
 #include "ui/gfx/size.h"
 #include "ui/views/controls/link_listener.h"
 #include "ui/views/view.h"
 
 namespace views {
 
 class Link;
 class StyledLabelListener;
 
@@ skipping 82 matching lines @@
   // This variable saves the result of the last GetHeightForWidth call in order
   // to avoid repeated calculation.
   gfx::Size calculated_size_;
 
   DISALLOW_COPY_AND_ASSIGN(StyledLabel);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_STYLED_LABEL_H_