Make room for any scrollbars in the content box and border box.

third_party/WebKit/Source/core/layout/LayoutBox.h

Index: third_party/WebKit/Source/core/layout/LayoutBox.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.h b/third_party/WebKit/Source/core/layout/LayoutBox.h
index c44a646e11f309c65e5f02e06d4348738e4dc849..64d091b96b3d8e5d4eee54e1abafc44dcf19a16f 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.h
@@ -1018,13 +1018,6 @@ class CORE_EXPORT LayoutBox : public LayoutBoxModelObject {
                                               : VerticalScrollbarWidth();
   }
 
-  // Return the width of the vertical scrollbar, unless it's larger than the
-  // logical width of the content box, in which case we'll return that instead.
-  // Scrollbar handling is quite bad in such situations, and this method here
-  // is just to make sure that left-hand scrollbars don't mess up
-  // scrollWidth. For the full story, visit crbug.com/724255
-  LayoutUnit VerticalScrollbarWidthClampedToContentBox() const;
-
   virtual ScrollResult Scroll(ScrollGranularity, const FloatSize&);
   bool CanBeScrolledAndHasScrollableArea() const;
   virtual bool CanBeProgramaticallyScrolled() const;