[ReferenceTarget] Add test coverage for setting reflected properties
Add test covereage for
- .anchorElement
- .ariaLabelledByElements
- .htmlFor
- .popoverTargetElement
Bug: 353748711
Change-Id: Id27da45a85937409ada79c6dcf0cbcf82f01fc01
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6020698
Reviewed-by: Dan Clark daniec@microsoft.com
Commit-Queue: Alex Keng shihken@microsoft.com
Cr-Commit-Position: refs/heads/main@{#1383250}