Avoid converting key to string for deleting of elements

src/runtime/runtime.h

Index: src/runtime/runtime.h
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index 2b51e072e74fc0468038403e5e04e7fa73574e93..0f708042c819d810f5b7b6337d803fd4b8e98797 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -820,6 +820,10 @@ class Runtime : public AllStatic {
   MUST_USE_RESULT static MaybeHandle<Object> GetElementOrCharAt(
       Isolate* isolate, Handle<Object> object, uint32_t index);
 
+  MUST_USE_RESULT static MaybeHandle<Object> DeleteObjectProperty(
+      Isolate* isolate, Handle<JSReceiver> receiver, Handle<Object> key,
+      LanguageMode language_mode);
+
   MUST_USE_RESULT static MaybeHandle<Object> SetObjectProperty(
       Isolate* isolate, Handle<Object> object, Handle<Object> key,
       Handle<Object> value, LanguageMode language_mode);