1 files changed, 11 insertions, 1 deletions
diff --git a/Source/WebCore/dom/MutationObserver.idl b/Source/WebCore/dom/MutationObserver.idl
index 9ee9792b3..f7a2c0f77 100644
--- a/Source/WebCore/dom/MutationObserver.idl
+++ b/Source/WebCore/dom/MutationObserver.idl
@@ -33,7 +33,17 @@
     CustomIsReachable,
     ImplementationLacksVTable,
 ] interface MutationObserver {
-    [RaisesException] void observe(Node target, Dictionary options);
+    [MayThrowException] void observe(Node target, optional MutationObserverInit options);
     sequence<MutationRecord> takeRecords();
     void disconnect();
 };
+
+dictionary MutationObserverInit {
+    boolean childList = false;
+    boolean attributes;
+    boolean characterData;
+    boolean subtree = false;
+    boolean attributeOldValue;
+    boolean characterDataOldValue;
+    sequence<DOMString> attributeFilter;
+};