Add template parameter to ElementTraversal to iterate over Elements of a specific type

Source/core/html/HTMLTableRowsCollection.cpp

Index: Source/core/html/HTMLTableRowsCollection.cpp
diff --git a/Source/core/html/HTMLTableRowsCollection.cpp b/Source/core/html/HTMLTableRowsCollection.cpp
index 5dbaeddc23f71d10e9e074579bfdadc11a3eb904..0f4623c850fa9a8dd91f255b12d4c2d1c0000ac5 100644
--- a/Source/core/html/HTMLTableRowsCollection.cpp
+++ b/Source/core/html/HTMLTableRowsCollection.cpp
@@ -55,11 +55,7 @@ static bool isInFoot(Element* row)
 
 static inline HTMLTableRowElement* findTableRowElementInChildren(Element& current)
 {
-    for (Element* child = ElementTraversal::firstWithin(current); child; child = ElementTraversal::nextSibling(*child)) {
-        if (isHTMLTableRowElement(child))
-            return toHTMLTableRowElement(child);
-    }
-    return 0;
+    return Traversal<HTMLTableRowElement>::firstWithin(current);
 }
 
 HTMLTableRowElement* HTMLTableRowsCollection::rowAfter(HTMLTableElement* table, HTMLTableRowElement* previous)
@@ -69,10 +65,8 @@ HTMLTableRowElement* HTMLTableRowsCollection::rowAfter(HTMLTableElement* table,
     // Start by looking for the next row in this section.
     // Continue only if there is none.
     if (previous && previous->parentNode() != table) {
-        for (child = ElementTraversal::nextSibling(*previous); child; child = ElementTraversal::nextSibling(*child)) {
-            if (isHTMLTableRowElement(child))
-                return toHTMLTableRowElement(child);
-        }
+        if (HTMLTableRowElement* row = Traversal<HTMLTableRowElement>::nextSibling(*previous))
+            return row;
     }
 
     // If still looking at head sections, find the first row in the next head section.