Make Position::BeforeNode() 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 181 matching lines @@
   const VisiblePositionTemplate<Strategy> visible_end =
       CreateVisiblePosition(end_);
   if (ShouldAnnotate() && NeedInterchangeNewlineAfter(visible_start)) {
     markup_accumulator.AppendInterchangeNewline();
     if (visible_start.DeepEquivalent() ==
         PreviousPositionOf(visible_end).DeepEquivalent())
       return markup_accumulator.TakeResults();
 
     first_node = NextPositionOf(visible_start).DeepEquivalent().AnchorNode();
 
-    if (past_end && PositionTemplate<Strategy>::BeforeNode(first_node)
+    if (past_end && PositionTemplate<Strategy>::BeforeNode(*first_node)
                             .CompareTo(PositionTemplate<Strategy>::BeforeNode(
-                                past_end)) >= 0) {
+                                *past_end)) >= 0) {
       // This condition hits in editing/pasteboard/copy-display-none.html.
       return markup_accumulator.TakeResults();
     }
   }
 
   // If there is no the highest node in the selected nodes, |m_lastClosed| can
   // be #text when its parent is a formatting tag. In this case, #text is
   // wrapped by <span> tag, but this text should be wrapped by the formatting
   // tag. See http://crbug.com/634482
   bool should_append_parent_tag = false;
@@ skipping 332 matching lines @@
   if (element.IsHTMLElement() && ShouldAnnotate())
     inline_style->MergeStyleFromRulesForSerialization(&ToHTMLElement(element));
 
   return inline_style;
 }
 
 template class StyledMarkupSerializer<EditingStrategy>;
 template class StyledMarkupSerializer<EditingInFlatTreeStrategy>;
 
 }  // namespace blink