Clean up toHTMLFooElement() using DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION

Source/core/html/HTMLVideoElement.h

Index: Source/core/html/HTMLVideoElement.h
diff --git a/Source/core/html/HTMLVideoElement.h b/Source/core/html/HTMLVideoElement.h
index f83915205cefc16dd3e73bbadc92d195aafa08d0..52e1f5ebbfe9555f8467f2569a38c2374a264a6f 100644
--- a/Source/core/html/HTMLVideoElement.h
+++ b/Source/core/html/HTMLVideoElement.h
@@ -100,11 +100,7 @@ inline bool isHTMLVideoElement(const Element* element)
     return element->hasTagName(HTMLNames::videoTag);
 }
 
-inline HTMLVideoElement* toHTMLVideoElement(Node* node)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || isHTMLVideoElement(node));
-    return static_cast<HTMLVideoElement*>(node);
-}
+DEFINE_NODE_TYPE_CASTS(HTMLVideoElement, hasTagName(HTMLNames::videoTag));
 
 } //namespace