Have StyledMarkupSerializer work on the Composed tree

Source/core/editing/markup.cpp

Index: Source/core/editing/markup.cpp
diff --git a/Source/core/editing/markup.cpp b/Source/core/editing/markup.cpp
index 9ef7d6b635a91d1502fe5be4377f510decbd9aad..d4e9ddbc9960d51c66207477d96419fcd99554dc 100644
--- a/Source/core/editing/markup.cpp
+++ b/Source/core/editing/markup.cpp
@@ -287,6 +287,12 @@ String createMarkup(const Position& startPosition, const Position& endPosition,
     return CreateMarkupAlgorithm<EditingStrategy>::createMarkup(startPosition, endPosition, shouldAnnotate, convertBlocksToInlines, shouldResolveURLs, constrainingAncestor);
 }
 
+String createMarkup(const PositionInComposedTree& startPosition, const PositionInComposedTree& endPosition, EAnnotateForInterchange shouldAnnotate, ConvertBlocksToInlines convertBlocksToInlines, EAbsoluteURLs shouldResolveURLs, Node* constrainingAncestor)
+{
+    ASSERT(startPosition.compareTo(endPosition) <= 0);
+    return CreateMarkupAlgorithm<EditingInComposedTreeStrategy>::createMarkup(startPosition, endPosition, shouldAnnotate, convertBlocksToInlines, shouldResolveURLs, constrainingAncestor);
+}
+
 PassRefPtrWillBeRawPtr<DocumentFragment> createFragmentFromMarkup(Document& document, const String& markup, const String& baseURL, ParserContentPolicy parserContentPolicy)
 {
     // We use a fake body element here to trick the HTML parser to using the InBody insertion mode.
@@ -717,5 +723,6 @@ void mergeWithNextTextNode(Text* textNode, ExceptionState& exceptionState)
 }
 
 template class CORE_TEMPLATE_EXPORT CreateMarkupAlgorithm<EditingStrategy>;
+template class CORE_TEMPLATE_EXPORT CreateMarkupAlgorithm<EditingInComposedTreeStrategy>;
 
 }