Have StyledMarkupSerializer work on the Composed tree

Source/core/editing/VisibleSelection.cpp

 /*
  * Copyright (C) 2004, 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 214 matching lines @@
         std::swap(normalizedStart, normalizedEnd);
     *outStart = normalizedStart.parentAnchoredEquivalent();
     *outEnd = normalizedEnd.parentAnchoredEquivalent();
 }
 
 void VisibleSelection::normalizePositions(const Position& start, const Position& end, Position* outStart, Position* outEnd)
 {
     return normalizePositionsAlgorithm<Position>(start, end, outStart, outEnd);
 }
 
+void VisibleSelection::normalizePositions(const PositionInComposedTree& start, const PositionInComposedTree& end, PositionInComposedTree* outStart, PositionInComposedTree* outEnd)
+{
+    return normalizePositionsAlgorithm<PositionInComposedTree>(start, end, outStart, outEnd);
+}
+
 bool VisibleSelection::toNormalizedPositions(Position& start, Position& end) const
 {
     if (isNone())
         return false;
 
     // Make sure we have an updated layout since this function is called
     // in the course of running edit commands which modify the DOM.
     // Failing to call this can result in equivalentXXXPosition calls returning
     // incorrect results.
     m_start.document()->updateLayout();
@@ skipping 695 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif