Add [CEReactions] IDL attributes for Custom Elements V1

third_party/WebKit/Source/core/dom/DOMStringMap.idl

Index: third_party/WebKit/Source/core/dom/DOMStringMap.idl
diff --git a/third_party/WebKit/Source/core/dom/DOMStringMap.idl b/third_party/WebKit/Source/core/dom/DOMStringMap.idl
index ee97b9a881f2dc09397efebc295231774b15ac03..2810903003c874ee06f1eb79388328149ed44a30 100644
--- a/third_party/WebKit/Source/core/dom/DOMStringMap.idl
+++ b/third_party/WebKit/Source/core/dom/DOMStringMap.idl
@@ -30,12 +30,12 @@
     SetWrapperReferenceFrom=element,
 ] interface DOMStringMap {
     [ImplementedAs=item] getter DOMString (DOMString name);
-    [RaisesException] setter void (DOMString name, DOMString value);
-    deleter void (DOMString name);
+    [CEReactions, RaisesException] setter void (DOMString name, DOMString value);
+    [CEReactions] deleter void (DOMString name);
 
     // FIXME: The indexed getter, setter and deleter are not in the
     // spec and simply converts the index to a string.
     [NotEnumerable] getter DOMString (unsigned long index);
-    [RaisesException] setter void (unsigned long index, DOMString value);
-    deleter void (unsigned long index);
+    [CEReactions, RaisesException] setter void (unsigned long index, DOMString value);
+    [CEReactions] deleter void (unsigned long index);
 };