Fixes https://github.com/dart-lang/sdk/issues/55024
The patch files for these operators return a bool, whereas
the public API returns a JSBoolean. Since there's only one
possible return type, we should make them return bool for
convenience. Boolean conversion is also inexpensive on
dart2wasm, so that shouldn't be an issue.
Also adds helpers to operator_test to make sure any JS values
are converted before they're compared, adding additional type
checking through the conversion.
CoreLibraryReviewExempt: Fixes type mismatch in backend-specific library.
Change-Id: I7ff2e334e817e6e7d7d8d5091a4e5d570a496b03
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/354702
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Srujan Gaddam <srujzs@google.com>
e1834792c3