Handlify JSReceiver/JSObject::DeleteProperty method.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index a0aecd8b275bc96c307d0e75d6700e59bb4f8b6a..c0ea772d1fa0000015fcda22bd4ae15de5bbc7f5 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -124,6 +124,15 @@ typedef ZoneList<Handle<Object> > ZoneObjectList;
     }                                                     \
   } while (false)
 
+#define RETURN_HANDLE_IF_SCHEDULED_EXCEPTION(isolate, T)  \
+  do {                                                    \
+    Isolate* __isolate__ = (isolate);                     \
+    if (__isolate__->has_scheduled_exception()) {         \
+      __isolate__->PromoteScheduledException();           \
+      return Handle<T>::null();                           \
+    }                                                     \
+  } while (false)
+
 #define RETURN_IF_EMPTY_HANDLE_VALUE(isolate, call, value) \
   do {                                                     \
     if ((call).is_null()) {                                \