Optimize / clean up hasTagName() call sites

Source/core/html/HTMLTableRowElement.cpp

Index: Source/core/html/HTMLTableRowElement.cpp
diff --git a/Source/core/html/HTMLTableRowElement.cpp b/Source/core/html/HTMLTableRowElement.cpp
index 154c8273ddaece57498330c156d226673643e2d8..34059fb04ea1b469a2c3edb6a906aa51ba69d2eb 100644
--- a/Source/core/html/HTMLTableRowElement.cpp
+++ b/Source/core/html/HTMLTableRowElement.cpp
@@ -80,7 +80,7 @@ int HTMLTableRowElement::rowIndex() const
         }
     }
 
-    for (Element* child = ElementTraversal::firstWithin(*table); child; child = ElementTraversal::nextSibling(*child)) {
+    for (HTMLElement* child = Traversal<HTMLElement>::firstWithin(*table); child; child = Traversal<HTMLElement>::nextSibling(*child)) {
         if (child->hasTagName(tbodyTag)) {
             HTMLTableSectionElement* section = toHTMLTableSectionElement(child);
             for (HTMLTableRowElement* row = Traversal<HTMLTableRowElement>::firstChild(*section); row; row = Traversal<HTMLTableRowElement>::nextSibling(*row)) {