Use references in RenderBlock and RenderBlockFlow methods

Source/core/rendering/RenderBlock.h

Index: Source/core/rendering/RenderBlock.h
diff --git a/Source/core/rendering/RenderBlock.h b/Source/core/rendering/RenderBlock.h
index 0b0d54852ce3d53f5525e9a68218b1a5d123fd69..85e46ef65ef8794dd828f63081981078dd772ef6 100644
--- a/Source/core/rendering/RenderBlock.h
+++ b/Source/core/rendering/RenderBlock.h
@@ -206,20 +206,20 @@ public:
     void setPageLogicalOffset(LayoutUnit offset) { m_pageLogicalOffset = offset; }
 
     // Accessors for logical width/height and margins in the containing block's block-flow direction.
-    LayoutUnit logicalWidthForChild(const RenderBox* child) const { return isHorizontalWritingMode() ? child->width() : child->height(); }
-    LayoutUnit logicalHeightForChild(const RenderBox* child) const { return isHorizontalWritingMode() ? child->height() : child->width(); }
-    LayoutSize logicalSizeForChild(const RenderBox* child) const { return isHorizontalWritingMode() ? child->size() : child->size().transposedSize(); }
-    LayoutUnit logicalTopForChild(const RenderBox* child) const { return isHorizontalWritingMode() ? child->y() : child->x(); }
-    LayoutUnit marginBeforeForChild(const RenderBoxModelObject* child) const { return child->marginBefore(style()); }
-    LayoutUnit marginAfterForChild(const RenderBoxModelObject* child) const { return child->marginAfter(style()); }
-    LayoutUnit marginStartForChild(const RenderBoxModelObject* child) const { return child->marginStart(style()); }
-    LayoutUnit marginEndForChild(const RenderBoxModelObject* child) const { return child->marginEnd(style()); }
-    void setMarginStartForChild(RenderBox* child, LayoutUnit value) const { child->setMarginStart(value, style()); }
-    void setMarginEndForChild(RenderBox* child, LayoutUnit value) const { child->setMarginEnd(value, style()); }
-    void setMarginBeforeForChild(RenderBox* child, LayoutUnit value) const { child->setMarginBefore(value, style()); }
-    void setMarginAfterForChild(RenderBox* child, LayoutUnit value) const { child->setMarginAfter(value, style()); }
-    LayoutUnit collapsedMarginBeforeForChild(const RenderBox* child) const;
-    LayoutUnit collapsedMarginAfterForChild(const RenderBox* child) const;
+    LayoutUnit logicalWidthForChild(const RenderBox& child) const { return isHorizontalWritingMode() ? child.width() : child.height(); }
+    LayoutUnit logicalHeightForChild(const RenderBox& child) const { return isHorizontalWritingMode() ? child.height() : child.width(); }
+    LayoutSize logicalSizeForChild(const RenderBox& child) const { return isHorizontalWritingMode() ? child.size() : child.size().transposedSize(); }
+    LayoutUnit logicalTopForChild(const RenderBox& child) const { return isHorizontalWritingMode() ? child.y() : child.x(); }
+    LayoutUnit marginBeforeForChild(const RenderBoxModelObject& child) const { return child.marginBefore(style()); }
+    LayoutUnit marginAfterForChild(const RenderBoxModelObject& child) const { return child.marginAfter(style()); }
+    LayoutUnit marginStartForChild(const RenderBoxModelObject& child) const { return child.marginStart(style()); }
+    LayoutUnit marginEndForChild(const RenderBoxModelObject& child) const { return child.marginEnd(style()); }
+    void setMarginStartForChild(RenderBox& child, LayoutUnit value) const { child.setMarginStart(value, style()); }
+    void setMarginEndForChild(RenderBox& child, LayoutUnit value) const { child.setMarginEnd(value, style()); }
+    void setMarginBeforeForChild(RenderBox& child, LayoutUnit value) const { child.setMarginBefore(value, style()); }
+    void setMarginAfterForChild(RenderBox& child, LayoutUnit value) const { child.setMarginAfter(value, style()); }
+    LayoutUnit collapsedMarginBeforeForChild(const RenderBox& child) const;
+    LayoutUnit collapsedMarginAfterForChild(const RenderBox& child) const;
 
     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override;
 
@@ -262,7 +262,7 @@ protected:
     void layoutPositionedObjects(bool relayoutChildren, PositionedLayoutBehavior = DefaultLayout);
     void markFixedPositionObjectForLayoutIfNeeded(RenderObject* child, SubtreeLayoutScope&);
 
-    LayoutUnit marginIntrinsicLogicalWidthForChild(RenderBox* child) const;
+    LayoutUnit marginIntrinsicLogicalWidthForChild(RenderBox& child) const;
 
     int beforeMarginInLineDirection(LineDirectionMode) const;
 
@@ -320,7 +320,7 @@ protected:
 
     virtual void computeSelfHitTestRects(Vector<LayoutRect>&, const LayoutPoint& layerOffset) const override;
 
-    void updateBlockChildDirtyBitsBeforeLayout(bool relayoutChildren, RenderBox*);
+    void updateBlockChildDirtyBitsBeforeLayout(bool relayoutChildren, RenderBox&);
 
     virtual bool isInlineBlockOrInlineTable() const override final { return isInline() && isReplaced(); }