Chris Bracken 535bb52c87 Revert onrender change (flutter/engine#49333)
This reverts https://github.com/flutter/engine/pull/49214 and
https://github.com/flutter/engine/pull/48758.

https://github.com/flutter/engine/pull/49214 appears to cause a Flutter
Gold diff during the engine roll. See
https://github.com/flutter/flutter/pull/140434 for an example. It's
unclear to me whether this is an expected diff and should be approved or
unexpected and should be reverting, so reverting to the last previous
rollable state.

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- [ ] I listed at least one issue that this PR fixes in the description
above.
- [ ] I added new tests to check the change I am making or feature I am
adding, or the PR is [test-exempt]. See [testing the engine] for
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[Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene
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https://github.com/flutter/flutter/wiki/Tree-hygiene#tests
[Flutter Style Guide]:
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[testing the engine]:
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2023-12-21 11:00:30 -08:00
..