Have positionInParentBeforeNode() / positionInParentAfterNode() take a reference

Source/core/editing/htmlediting.h

Index: Source/core/editing/htmlediting.h
diff --git a/Source/core/editing/htmlediting.h b/Source/core/editing/htmlediting.h
index 5439bc0402e23d7293c1e6ef338c160cd4635090..115ad0d6e6ad9739b206ab0f8d8700b6fdf20c1a 100644
--- a/Source/core/editing/htmlediting.h
+++ b/Source/core/editing/htmlediting.h
@@ -109,7 +109,7 @@ bool isTableStructureNode(const Node*);
 bool isListElement(Node*);
 bool isListItem(const Node*);
 bool isNodeRendered(const Node*);
-bool isNodeVisiblyContainedWithin(Node*, const Range*);
+bool isNodeVisiblyContainedWithin(Node&, const Range&);
 bool isRenderedAsNonInlineTableImageOrHR(const Node*);
 bool areIdenticalElements(const Node*, const Node*);
 bool isNonTableCellHTMLBlockElement(const Node*);
@@ -165,7 +165,7 @@ bool isAtUnsplittableElement(const Position&);
 // miscellaneous functions on Position
 
 unsigned numEnclosingMailBlockquotes(const Position&);
-void updatePositionForNodeRemoval(Position&, Node*);
+void updatePositionForNodeRemoval(Position&, Node&);
 
 // -------------------------------------------------------------------------
 // VisiblePosition
@@ -175,8 +175,8 @@ void updatePositionForNodeRemoval(Position&, Node*);
 
 VisiblePosition firstEditablePositionAfterPositionInRoot(const Position&, Node*);
 VisiblePosition lastEditablePositionBeforePositionInRoot(const Position&, Node*);
-VisiblePosition visiblePositionBeforeNode(Node*);
-VisiblePosition visiblePositionAfterNode(Node*);
+VisiblePosition visiblePositionBeforeNode(Node&);
+VisiblePosition visiblePositionAfterNode(Node&);
 
 bool lineBreakExistsAtVisiblePosition(const VisiblePosition&);