Move StyledMarkupAccumulator::shouldApplyWrappingStyle to its serializer

Source/core/editing/StyledMarkupSerializer.h

Index: Source/core/editing/StyledMarkupSerializer.h
diff --git a/Source/core/editing/StyledMarkupSerializer.h b/Source/core/editing/StyledMarkupSerializer.h
index 78460b57fd5a6c9a05e034a2b93a69388b130aa7..2d6d5b44592f2c0ee26e1f01edb98b2ee470d12a 100644
--- a/Source/core/editing/StyledMarkupSerializer.h
+++ b/Source/core/editing/StyledMarkupSerializer.h
@@ -51,11 +51,14 @@ public:
 
 private:
     bool convertBlocksToInlines() const { return m_convertBlocksToInlines == ConvertBlocksToInlines::Convert; }
+    bool shouldAnnotate() const { return m_shouldAnnotate == AnnotateForInterchange; }
     Node* serializeNodes(Node* startNode, Node* pastEnd, StyledMarkupAccumulator*);
     Node* traverseNodesForSerialization(Node* startNode, Node* pastEnd, StyledMarkupAccumulator*);
     void wrapWithNode(StyledMarkupAccumulator&, ContainerNode&, PassRefPtrWillBeRawPtr<EditingStyle>);
     RefPtrWillBeRawPtr<EditingStyle> createInlineStyleIfNeeded(StyledMarkupAccumulator&, Node&);
     bool needsInlineStyle(const Element&);
+    void appendStartMarkup(StyledMarkupAccumulator&, Node&);
+    bool shouldApplyWrappingStyle(const StyledMarkupAccumulator&, const Node&) const;
 
     const PositionType m_start;
     const PositionType m_end;