Bug 1037128 - Regression: Contact API usage is being prompt on webpages r=fabrice

dom/contacts/ContactManager.js

@@ -250,8 +250,10 @@ ContactManager.prototype = {
     if (permValue == Ci.nsIPermissionManager.ALLOW_ACTION) {
       aAllowCallback();
       return;
-    } else if (permValue == Ci.nsIPermissionManager.DENY_ACTION) {
-      aCancelCallback();
+    } else if (permValue == Ci.nsIPermissionManager.DENY_ACTION ||
+               permValue == Ci.nsIPermissionManager.UNKNOWN_ACTION) {
+       aCancelCallback();
+      return;
     }
 
     // Create an array with a single nsIContentPermissionType element.