7484f1683c
<!-- Please describe your changes on the following line: --> Use the NonZero trait to reduce space usage of `Option<PipelineId>`. This needs a bump of serde to get https://github.com/serde-rs/serde/pull/1003. --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] There are tests for these changes OR <!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.--> <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> Source-Repo: https://github.com/servo/servo Source-Revision: 7256a05d74596269ca50dd42888b790016ff25af