Bug 917598 - ISimpleDOMNode::innerHTML does not work on math elements, r=tbsaunde

accessible/src/windows/sdn/sdnAccessible.cpp

@@ -466,12 +466,11 @@ sdnAccessible::get_innerHTML(BSTR __RPC_FAR* aInnerHTML)
   if (IsDefunct())
     return CO_E_OBJNOTCONNECTED;
 
-  nsCOMPtr<nsIDOMHTMLElement> htmlElement = do_QueryInterface(mNode);
-  if (!htmlElement)
+  if (!mNode->IsElement())
     return S_FALSE;
 
   nsAutoString innerHTML;
-  htmlElement->GetInnerHTML(innerHTML);
+  mNode->AsElement()->GetInnerHTML(innerHTML);
   if (innerHTML.IsEmpty())
     return S_FALSE;