Have Node::enclosingLinkEventParentOrSelf() return an Element

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index d7e4d8ab891a5c6025735c92509d3c26d7bfb2a1..b407e14c8cb16d0bbbd5bdaae3be45d3c4da0d73 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -1815,14 +1815,17 @@ void Node::showTreeForThisAcrossFrame() const
 
 // --------
 
-Node* Node::enclosingLinkEventParentOrSelf()
+Element* Node::enclosingLinkEventParentOrSelf()
 {
     for (Node* node = this; node; node = NodeRenderingTraversal::parent(node)) {
         // For imagemaps, the enclosing link node is the associated area element not the image itself.
         // So we don't let images be the enclosingLinkNode, even though isLink sometimes returns true
         // for them.
-        if (node->isLink() && !isHTMLImageElement(*node))
-            return node;
+        if (node->isLink() && !isHTMLImageElement(*node)) {
+            // Casting to Element is safe because only HTMLAnchorElement, HTMLImageElement and
+            // SVGAElement can return true for isLink().
+            return toElement(node);
+        }
     }
 
     return 0;