After https://crrev.com/c/3859787 those frames would be printed like
standard Wasm frames, but in the place of the WasmInstanceObject, they
have a WasmApiFunctionRef object instead.
So special-case the {WasmToJsFrame::instance()} to load the instance
properly. Also special-case the {position()} accessor for imported
functions.
R=victorgomes@chromium.org
Bug: chromium:1402270
Change-Id: I39805805a50e7a73d7d8075c63c46bdf5a373a33
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4116778
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#84993}
