Remove some remnants of MaybeObjects in objects.*.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 694a51f69c9915ceae543b6af3fa5b6e82cc1a51..938a2b37d01027b19f3fac650e09cc1925a5223c 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -694,7 +694,7 @@ static i::Handle<i::FixedArray> EmbedderDataFor(Context* context,
     return i::Handle<i::FixedArray>();
   }
   int new_size = i::Max(index, data->length() << 1) + 1;
-  data = env->GetIsolate()->factory()->CopySizeFixedArray(data, new_size);
+  data = i::FixedArray::CopySize(data, new_size);
   env->set_embedder_data(*data);
   return data;
 }