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

ui/views/controls/label.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_VIEWS_CONTROLS_LABEL_H_
 #define UI_VIEWS_CONTROLS_LABEL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/text_constants.h"
 #include "ui/views/view.h"
 
 namespace views {
 
 /////////////////////////////////////////////////////////////////////////////
 //
 // Label class
@@ skipping 257 matching lines @@
   // The cached heights to avoid recalculation in GetHeightForWidth().
   std::vector<gfx::Size> cached_heights_;
   int cached_heights_cursor_;
 
   DISALLOW_COPY_AND_ASSIGN(Label);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_LABEL_H_