Add [CEReactions] IDL attributes for Custom Elements V1

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

Index: third_party/WebKit/Source/core/html/HTMLDocument.idl
diff --git a/third_party/WebKit/Source/core/html/HTMLDocument.idl b/third_party/WebKit/Source/core/html/HTMLDocument.idl
index 2b3f5b979fe3e1f288278e2806bd8fd15a4d7dbf..0eda6bea4e44471d7ae6209e75a7a81da309d2c4 100644
--- a/third_party/WebKit/Source/core/html/HTMLDocument.idl
+++ b/third_party/WebKit/Source/core/html/HTMLDocument.idl
@@ -26,11 +26,11 @@
 interface HTMLDocument : Document {
     // https://html.spec.whatwg.org/#Document-partial
 
-    [TreatNullAs=EmptyString, CustomElementCallbacks] attribute DOMString fgColor;
-    [TreatNullAs=EmptyString, CustomElementCallbacks] attribute DOMString linkColor;
-    [TreatNullAs=EmptyString, CustomElementCallbacks] attribute DOMString vlinkColor;
-    [TreatNullAs=EmptyString, CustomElementCallbacks] attribute DOMString alinkColor;
-    [TreatNullAs=EmptyString, CustomElementCallbacks] attribute DOMString bgColor;
+    [TreatNullAs=EmptyString, CEReactions, CustomElementCallbacks] attribute DOMString fgColor;
+    [TreatNullAs=EmptyString, CEReactions, CustomElementCallbacks] attribute DOMString linkColor;
+    [TreatNullAs=EmptyString, CEReactions, CustomElementCallbacks] attribute DOMString vlinkColor;
+    [TreatNullAs=EmptyString, CEReactions, CustomElementCallbacks] attribute DOMString alinkColor;
+    [TreatNullAs=EmptyString, CEReactions, CustomElementCallbacks] attribute DOMString bgColor;
 
     [MeasureAs=DocumentClear] void clear();
     [MeasureAs=DocumentCaptureEvents] void captureEvents();