Refactoring: Add StyledMarkupAccumulator::createInlineStyle from appendElement

Source/core/editing/StyledMarkupAccumulator.h

Index: Source/core/editing/StyledMarkupAccumulator.h
diff --git a/Source/core/editing/StyledMarkupAccumulator.h b/Source/core/editing/StyledMarkupAccumulator.h
index 5a00af9e5877d9d959c846e63ba9a098b5420112..c7e820bd66a7c720ff70be2859bc725cc961e630 100644
--- a/Source/core/editing/StyledMarkupAccumulator.h
+++ b/Source/core/editing/StyledMarkupAccumulator.h
@@ -78,6 +78,8 @@ private:
     void appendElement(StringBuilder&, Element&);
     void appendEndMarkup(StringBuilder&, const Element&);
 
+    RefPtrWillBeRawPtr<EditingStyle> createInlineStyle(Element&, bool addDisplayInline, RangeFullySelectsNode);
+
     MarkupFormatter m_formatter;
     const TextOffset m_start;
     const TextOffset m_end;