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servo/components/script
bors-servo da8d15427c Auto merge of #15527 - simon-whitehead:fix-15521, r=cbrewster
Make HTMLOptionsCollection constructor accept a HTMLSelectElement argument. Fixes #15521

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Moves the `HTMLSelectElement.upcast()` call into the `HTMLOptionsCollection` constructors, replacing their signatures with `&HTMLSelectElement` references. This limits the surface area for misuse by only allowing `HTMLSelectElement` instances to be passed in rather than `Node` instances.

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #15521.

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- [ ] There are tests for these changes OR
- [x] These changes do not require tests because: the linked issue explicitly says building without errors is good enough.

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