Remove Traversal<Element> specializations for lastWithin() / previous()

Remove Traversal<Element> template specializations for lastWithin() /
previous() as they are now identical to the generic implementations after
r178540.

R=esprehn@chromium.org, abarth@chromium.org

Review URL: https://codereview.chromium.org/413133008

git-svn-id: svn://svn.chromium.org/blink/trunk@179064 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/dom/ElementTraversal.h

@@ -111,16 +111,6 @@ inline Element* Traversal<Element>::firstWithinTemplate(NodeType& current)
     return firstChildTemplate(current);
 }
 
-template <>
-template <class NodeType>
-inline Element* Traversal<Element>::lastWithinTemplate(NodeType& current)
-{
-    Node* node = NodeTraversal::lastWithin(current);
-    while (node && !node->isElementNode())
-        node = NodeTraversal::previous(*node, &current);
-    return toElement(node);
-}
-
 template <>
 template <class NodeType>
 inline Element* Traversal<Element>::nextTemplate(NodeType& current)
@@ -141,26 +131,6 @@ inline Element* Traversal<Element>::nextTemplate(NodeType& current, const Node*
     return toElement(node);
 }
 
-template <>
-template <class NodeType>
-inline Element* Traversal<Element>::previousTemplate(NodeType& current)
-{
-    Node* node = NodeTraversal::previous(current);
-    while (node && !node->isElementNode())
-        node = NodeTraversal::previous(*node);
-    return toElement(node);
-}
-
-template <>
-template <class NodeType>
-inline Element* Traversal<Element>::previousTemplate(NodeType& current, const Node* stayWithin)
-{
-    Node* node = NodeTraversal::previous(current, stayWithin);
-    while (node && !node->isElementNode())
-        node = NodeTraversal::previous(*node, stayWithin);
-    return toElement(node);
-}
-
 // Generic versions.
 template <class ElementType>
 template <class NodeType>