Tighten OpenHandle's extra checks.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index c63a93885d631614cfa6c19058663f480b6693dc..c28c690bb678e13ee621791daf208b6e3367ac85 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -6034,7 +6034,7 @@ RUNTIME_FUNCTION(Runtime_GetNamedInterceptorPropertyNames) {
   CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
 
   if (obj->HasNamedInterceptor()) {
-    Handle<JSArray> result;
+    Handle<JSObject> result;
     if (JSObject::GetKeysForNamedInterceptor(obj, obj).ToHandle(&result)) {
       return *result;
     }
@@ -6051,7 +6051,7 @@ RUNTIME_FUNCTION(Runtime_GetIndexedInterceptorElementNames) {
   CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
 
   if (obj->HasIndexedInterceptor()) {
-    Handle<JSArray> result;
+    Handle<JSObject> result;
     if (JSObject::GetKeysForIndexedInterceptor(obj, obj).ToHandle(&result)) {
       return *result;
     }