Make VisiblePosition::BeforeNode() to take const Node& instead of Node*

third_party/WebKit/Source/core/editing/commands/InsertParagraphSeparatorCommand.cpp

 /*
  * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 520 matching lines @@
       !LineBreakExistsAtVisiblePosition(visible_pos)) {
     AppendNode(HTMLBRElement::Create(GetDocument()), block_to_insert,
                editing_state);
     if (editing_state->IsAborted())
       return;
     GetDocument().UpdateStyleAndLayoutIgnorePendingStylesheets();
   }
 
   // Move the start node and the siblings of the start node.
   if (CreateVisiblePosition(insertion_position).DeepEquivalent() !=
-      VisiblePosition::BeforeNode(block_to_insert).DeepEquivalent()) {
+      VisiblePosition::BeforeNode(*block_to_insert).DeepEquivalent()) {
     Node* n;
     if (insertion_position.ComputeContainerNode() == start_block) {
       n = insertion_position.ComputeNodeAfterPosition();
     } else {
       Node* split_to = insertion_position.ComputeContainerNode();
       if (split_to->IsTextNode() &&
           insertion_position.OffsetInContainerNode() >=
               CaretMaxOffset(split_to))
         split_to = NodeTraversal::Next(*split_to, start_block);
       if (split_to)
         SplitTreeToNode(split_to, start_block);
 
       GetDocument().UpdateStyleAndLayoutIgnorePendingStylesheets();
 
       for (n = start_block->firstChild(); n; n = n->nextSibling()) {
-        VisiblePosition before_node_position = VisiblePosition::BeforeNode(n);
+        VisiblePosition before_node_position = VisiblePosition::BeforeNode(*n);
         if (!before_node_position.IsNull() &&
             ComparePositions(CreateVisiblePosition(insertion_position),
                              before_node_position) <= 0)
           break;
       }
     }
 
     MoveRemainingSiblingsToNewParent(n, block_to_insert, block_to_insert,
                                      editing_state);
     if (editing_state->IsAborted())
@@ skipping 27 matching lines @@
           .Build());
   ApplyStyleAfterInsertion(start_block, editing_state);
 }
 
 DEFINE_TRACE(InsertParagraphSeparatorCommand) {
   visitor->Trace(style_);
   CompositeEditCommand::Trace(visitor);
 }
 
 }  // namespace blink