Add [CEReactions] IDL attributes for Custom Elements V1

third_party/WebKit/Source/core/html/HTMLLIElement.idl

Index: third_party/WebKit/Source/core/html/HTMLLIElement.idl
diff --git a/third_party/WebKit/Source/core/html/HTMLLIElement.idl b/third_party/WebKit/Source/core/html/HTMLLIElement.idl
index b80c48923bdfbce3412c7c8d98e1f6bcb94d2b54..b9ed2dee56aa663a7b643f082259713bfac2ff78 100644
--- a/third_party/WebKit/Source/core/html/HTMLLIElement.idl
+++ b/third_party/WebKit/Source/core/html/HTMLLIElement.idl
@@ -20,9 +20,9 @@
 // https://html.spec.whatwg.org/#the-li-element
 
 interface HTMLLIElement : HTMLElement {
-    [Reflect] attribute long value;
+    [CEReactions, Reflect] attribute long value;
 
     // obsolete members
     // https://html.spec.whatwg.org/#HTMLLIElement-partial
-    [Reflect] attribute DOMString type;
+    [CEReactions, Reflect] attribute DOMString type;
 };