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a2937d9488
Unify the task source and task canceller API To do so, I created a struct `TaskManagement(TaskSource, TaskCanceller)` and made `*_task_source` return that instead of just the task source. Next, I refactored all places in which `task_canceller` by basically removing them in favour of a previously called `*_task_source`. I tried to make `task_canceller` a private method in `Window`, with the hope of enforcing the use of `*_task_source`. However, it's used in components/script/dom/globalscope.rs:575 in such a way that will make it harder to avoid. I decided to leave it that way. It'd be possible to unify `*_task_source` in such a way that we would have only one method. However, I decided not to do it because one of the `TaskSource` implementations is special: `history_traversal_task_source`. Not wanting to over complicate things, I decided to leave the structure this way. --- - [x] `./mach build -d` does not report any errors - [x] `./mach test-tidy` does not report any errors - [x] These changes fix #21154 (github issue number if applicable). - [x] These changes do not require tests because it's refactoring code that should already be tested. <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/21804) <!-- Reviewable:end -->
