3f1c69dd1d
Closes https://github.com/dart-lang/sdk/issues/48630 'mark' can return undefined in Firefox, and therefore needs to return a nullable. Similarly, the different syntaxes of 'measure' don't work in Firefox or Safari, so the incompatible ones are removed from tests. Change-Id: Ia137fe0d72ddbaad03ae8cf58c43736b128b3f33 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/237930 Reviewed-by: Riley Porter <rileyporter@google.com> Commit-Queue: Srujan Gaddam <srujzs@google.com>