Support destroyObject(o) on ES6 class instances

[donmccurdy]

Description

Currently destroyObject(object) cannot see methods of ES6 class instances, and fails to replace them when the object is destroyed. As discussed in #12266, the behavior of destroyObject could perhaps be reconsidered. However, I think adoption of ES6 class syntax (and type checking, which ES6 classes are a prerequisite for) will be smoother if we can avoid unnecessary functional changes within the migration, so... I'd like to try making destroyObject compatible with ES6 classes.

This PR extends destroyObject to support ES6 class instances as input, and adds unit tests for both ES6 classes and prototype-based inheritance to verify that both continue to work as expected.

Issue number and link

• Related Should destroyObject also replace .destroy()? #12266

Testing plan

See unit tests added.

Author checklist

• I have submitted a Contributor License Agreement
• I have added my name to CONTRIBUTORS.md
• I have updated CHANGES.md with a short summary of my change
• I have added or updated unit tests to ensure consistent code coverage
• I have updated the inline documentation, and included code examples where relevant
• I have performed a self-review of my code

AI acknowledgment

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PR Dependency Tree

• PR Support destroyObject(o) on ES6 class instances #13560 👈

This tree was auto-generated by Charcoal

[github-actions]

Thank you for the pull request, @donmccurdy!

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