Port Node's previousElementSibling() / nextElementSibling() to ElementTraversal

Source/core/dom/Element.h

Index: Source/core/dom/Element.h
diff --git a/Source/core/dom/Element.h b/Source/core/dom/Element.h
index 336dc9acd9f48d661ed6154cf880d6130bb2ceff..8886f69fd5a48dac9362220b780d1faa19741dd0 100644
--- a/Source/core/dom/Element.h
+++ b/Source/core/dom/Element.h
@@ -700,22 +700,6 @@ inline Element* Node::parentElement() const
     return parent && parent->isElementNode() ? toElement(parent) : 0;
 }
 
-inline Element* Node::previousElementSibling() const
-{
-    Node* n = previousSibling();
-    while (n && !n->isElementNode())
-        n = n->previousSibling();
-    return toElement(n);
-}
-
-inline Element* Node::nextElementSibling() const
-{
-    Node* n = nextSibling();
-    while (n && !n->isElementNode())
-        n = n->nextSibling();
-    return toElement(n);
-}
-
 inline bool Element::fastHasAttribute(const QualifiedName& name) const
 {
     ASSERT(fastAttributeLookupAllowed(name));