Bug 668817 - Update the validity when changing the multiple attribute. r=sicking

content/html/content/src/nsHTMLInputElement.cpp

@@ -907,6 +907,8 @@ nsHTMLInputElement::AfterSetAttr(PRInt32 aNameSpaceID, nsIAtom* aName,
       UpdateTooLongValidityState();
     } else if (aName == nsGkAtoms::pattern) {
       UpdatePatternMismatchValidityState();
+    } else if (aName == nsGkAtoms::multiple) {
+      UpdateTypeMismatchValidityState();
     }
 
     UpdateEditableState(aNotify);