Fix CurrentMapForDeprecated() to return MaybeHandle instead of a null handle.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index c63a93885d631614cfa6c19058663f480b6693dc..611f432108bdfd3a2ba671e380a30c2e21458719 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -14594,8 +14594,7 @@ RUNTIME_FUNCTION(Runtime_TryMigrateInstance) {
   // code where we can't handle lazy deopts for lack of a suitable bailout
   // ID. So we just try migration and signal failure if necessary,
   // which will also trigger a deopt.
-  Handle<Object> result = JSObject::TryMigrateInstance(js_object);
-  if (result.is_null()) return Smi::FromInt(0);
+  if (!JSObject::TryMigrateInstance(js_object)) return Smi::FromInt(0);
   return *object;
 }