Make VisiblePosition constructor to canonicalize a position in composed tree

Source/core/editing/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:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 92 matching lines @@
     void appendEndMarkup(Node&);
     RefPtrWillBeRawPtr<EditingStyle> createInlineStyle(Element&);
     bool needsInlineStyle(const Element&);
     bool shouldApplyWrappingStyle(const Node&) const;
 
     StyledMarkupAccumulator* m_accumulator;
     RefPtrWillBeMember<Node> m_lastClosed;
     RefPtrWillBeMember<EditingStyle> m_wrappingStyle;
 };
 
-static Position toPositionInDOMTree(const Position& position)
-{
-    return position;
-}
-
 template<typename Strategy>
 bool StyledMarkupTraverser<Strategy>::shouldAnnotate() const
 {
     return m_accumulator->shouldAnnotate();
 }
 
 template<typename Strategy>
 bool StyledMarkupTraverser<Strategy>::convertBlocksToInlines() const
 {
     return m_accumulator->convertBlocksToInlines();
@@ skipping 362 matching lines @@
     if (element.isHTMLElement() && shouldAnnotate())
         inlineStyle->mergeStyleFromRulesForSerialization(&toHTMLElement(element));
 
     return inlineStyle;
 }
 
 template class StyledMarkupSerializer<EditingStrategy>;
 template class StyledMarkupSerializer<EditingInComposedTreeStrategy>;
 
 } // namespace blink