Add [CEReactions] IDL attributes for Custom Elements V1

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

Index: third_party/WebKit/Source/core/html/HTMLMetaElement.idl
diff --git a/third_party/WebKit/Source/core/html/HTMLMetaElement.idl b/third_party/WebKit/Source/core/html/HTMLMetaElement.idl
index c575e0377d55286e19b80bcf80fb19678258fa9a..e07c48dc9d01fb53e1ba8b13e65f5aee00726fad 100644
--- a/third_party/WebKit/Source/core/html/HTMLMetaElement.idl
+++ b/third_party/WebKit/Source/core/html/HTMLMetaElement.idl
@@ -20,11 +20,11 @@
 // https://html.spec.whatwg.org/#the-meta-element
 
 interface HTMLMetaElement : HTMLElement {
-    [Reflect] attribute DOMString name;
-    [Reflect=http_equiv] attribute DOMString httpEquiv;
-    [Reflect] attribute DOMString content;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect=http_equiv] attribute DOMString httpEquiv;
+    [CEReactions, Reflect] attribute DOMString content;
 
     // obsolete members
     // https://html.spec.whatwg.org/#HTMLMetaElement-partial
-    [Reflect] attribute DOMString scheme;
+    [CEReactions, Reflect] attribute DOMString scheme;
 };