Remove scrollbar width/height computations from layout.

sky/engine/core/rendering/RenderBox.h

Index: sky/engine/core/rendering/RenderBox.h
diff --git a/sky/engine/core/rendering/RenderBox.h b/sky/engine/core/rendering/RenderBox.h
index ed886f7cfd993705813098673169dfee2dde52ba..af18d70fd1357bd4e4a8baa362bc6ce6233cc957 100644
--- a/sky/engine/core/rendering/RenderBox.h
+++ b/sky/engine/core/rendering/RenderBox.h
@@ -232,7 +232,7 @@ public:
 
     // More IE extensions.  clientWidth and clientHeight represent the interior of an object
     // excluding border and scrollbar.  clientLeft/Top are just the borderLeftWidth and borderTopWidth.
-    LayoutUnit clientLeft() const { return borderLeft() + (style()->shouldPlaceBlockDirectionScrollbarOnLogicalLeft() ? verticalScrollbarWidth() : 0); }
+    LayoutUnit clientLeft() const { return borderLeft(); }
     LayoutUnit clientTop() const { return borderTop(); }
     LayoutUnit clientWidth() const;
     LayoutUnit clientHeight() const;
@@ -403,7 +403,7 @@ public:
     LayoutUnit computeLogicalWidthUsing(SizeType, const Length& logicalWidth, LayoutUnit availableLogicalWidth, const RenderBlock* containingBlock) const;
     LayoutUnit computeLogicalHeightUsing(const Length& height, LayoutUnit intrinsicContentHeight) const;
     LayoutUnit computeContentLogicalHeight(const Length& height, LayoutUnit intrinsicContentHeight) const;
-    LayoutUnit computeContentAndScrollbarLogicalHeightUsing(const Length& height, LayoutUnit intrinsicContentHeight) const;
+    LayoutUnit computeContentLogicalHeightUsing(const Length& height, LayoutUnit intrinsicContentHeight) const;
     LayoutUnit computeReplacedLogicalWidthUsing(const Length& width) const;
     LayoutUnit computeReplacedLogicalWidthRespectingMinMaxWidth(LayoutUnit logicalWidth, ShouldComputePreferred  = ComputeActual) const;
     LayoutUnit computeReplacedLogicalHeightUsing(const Length& height) const;
@@ -425,10 +425,6 @@ public:
     LayoutUnit availableWidth() const { return availableLogicalWidth(); }
     LayoutUnit availableHeight() const { return availableLogicalHeight(IncludeMarginBorderPadding); }
 
-    virtual int verticalScrollbarWidth() const;
-    int horizontalScrollbarHeight() const;
-    int instrinsicScrollbarLogicalWidth() const;
-    int scrollbarLogicalHeight() const { return horizontalScrollbarHeight(); }
     virtual bool scroll(ScrollDirection, ScrollGranularity, float delta = 1);
     bool canBeScrolledAndHasScrollableArea() const;
     virtual bool canBeProgramaticallyScrolled() const;