worker: allow passing JS wrapper objects via postMessage

Enable JS wrapper objects to be used as transferable or cloneable
objects in `postMessage()` calls, by having them extend a C++-backed
class.

This requires a few internal changes:
- This commit adds the possibility for transferred objects to
  read/write JS values at the end of the serialization/deserialization
  phases.
- This commit adds the possibility for transferred objects to list
  sub-transferables, e.g. typically the public JS wrapper class
  would list its C++ handle in there.
- This commit adds usage of `BaseObject` in a few more places, because
  now during deserialization weakly held objects can also be involved,
  in addition to `MessagePort`s.

PR-URL: https://github.com/nodejs/node/pull/33772
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/node.gyp b/node.gyp
index 1ebb8c2cc97..37af98ba424 100644
--- a/node.gyp
+++ b/node.gyp
@@ -220,6 +220,7 @@
       'lib/internal/vm/module.js',
       'lib/internal/worker.js',
       'lib/internal/worker/io.js',
+      'lib/internal/worker/js_transferable.js',
       'lib/internal/watchdog.js',
       'lib/internal/streams/lazy_transform.js',
       'lib/internal/streams/async_iterator.js',