Refactoring: toHTMLElement(const Node*) added but never used. Using it.

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 e70895fa3661f4f563c56d120692454538374820..2c7c3c0ac846e4281576cb5a03370f38d9ac63d1 100644
--- a/Source/core/editing/markup.cpp
+++ b/Source/core/editing/markup.cpp
@@ -483,7 +483,7 @@ static PassRefPtr<EditingStyle> styleFromMatchedRulesAndInlineDecl(const Node* n
 
     // FIXME: Having to const_cast here is ugly, but it is quite a bit of work to untangle
     // the non-const-ness of styleFromMatchedRulesForElement.
-    HTMLElement* element = const_cast<HTMLElement*>(static_cast<const HTMLElement*>(node));
+    HTMLElement* element = const_cast<HTMLElement*>(toHTMLElement(node));
     RefPtr<EditingStyle> style = EditingStyle::create(element->inlineStyle());
     style->mergeStyleFromRules(element);
     return style.release();