Make Position::FirstPositionInNode() to take const Node& instead of Node*

third_party/WebKit/Source/core/editing/serializers/StyledMarkupSerializer.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008, 2009, 2010, 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Igalia S.L.
  * Copyright (C) 2011 Motorola Mobility. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 213 matching lines @@
 
   StyledMarkupTraverser<Strategy> traverser(&markup_accumulator, last_closed_);
   Node* last_closed = traverser.Traverse(first_node, past_end);
 
   if (highest_node_to_be_serialized_ && last_closed) {
     // TODO(hajimehoshi): This is calculated at createMarkupInternal too.
     Node* common_ancestor = Strategy::CommonAncestor(
         *start_.ComputeContainerNode(), *end_.ComputeContainerNode());
     DCHECK(common_ancestor);
     HTMLBodyElement* body = toHTMLBodyElement(EnclosingElementWithTag(
-        Position::FirstPositionInNode(common_ancestor), bodyTag));
+        Position::FirstPositionInNode(*common_ancestor), bodyTag));
     HTMLBodyElement* fully_selected_root = nullptr;
     // FIXME: Do this for all fully selected blocks, not just the body.
     if (body && AreSameRanges(body, start_, end_))
       fully_selected_root = body;
 
     // Also include all of the ancestors of lastClosed up to this special
     // ancestor.
     // FIXME: What is ancestor?
     for (ContainerNode* ancestor = Strategy::Parent(*last_closed); ancestor;
          ancestor = Strategy::Parent(*ancestor)) {
@@ skipping 302 matching lines @@
   if (element.IsHTMLElement() && ShouldAnnotate())
     inline_style->MergeStyleFromRulesForSerialization(&ToHTMLElement(element));
 
   return inline_style;
 }
 
 template class StyledMarkupSerializer<EditingStrategy>;
 template class StyledMarkupSerializer<EditingInFlatTreeStrategy>;
 
 }  // namespace blink