Update IDL to 1847

core/css/StyleSheetList.idl

Index: core/css/StyleSheetList.idl
diff --git a/core/css/StyleSheetList.idl b/core/css/StyleSheetList.idl
index 7341728216d78c6ff0c5bd3c06acae2eb16a335c..104a387625e52ae6e7f098d2a81430958ec080f5 100644
--- a/core/css/StyleSheetList.idl
+++ b/core/css/StyleSheetList.idl
@@ -20,10 +20,9 @@
 
 // Introduced in DOM Level 2:
 [
-    GenerateVisitDOMWrapper=document,
+    SetWrapperReferenceFrom=document,
 ] interface StyleSheetList {
-    readonly attribute unsigned long    length;
-    getter StyleSheet         item(unsigned long index);
-    [ImplementedAs=anonymousNamedGetter, NotEnumerable] getter CSSStyleSheet (DOMString name);
+    readonly attribute unsigned long length;
+    getter StyleSheet item(unsigned long index);
+    [NotEnumerable] getter CSSStyleSheet (DOMString name);
 };
-