Update Resize Observer.widl

Author: manucorporat

inputfiles/idl/Resize Observer.widl

@@ -14,7 +14,7 @@ interface ResizeObserver {
     void disconnect();
 };
 
-callback ResizeObserverCallback = void (sequence<ResizeObserverEntry> entries, ResizeObserver observer);
+callback ResizeObserverCallback = void (FrozenArray<ResizeObserverEntry> entries, ResizeObserver observer);
 
 [Exposed=Window]
 interface ResizeObserverEntry {