Auto merge of #24758 - gterzian:impl_timer_task_source, r=nox

Implement timer-task-source, time-out service worker

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Implements the timer task-source, and folds the IPC glue-code into a single route set by the globalscope.

Also switches service worker to using a dedicated "time-out" mechanism, which previously relied on the timer mechanism(and I think didn't actually implement script timers).

---
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- [ ] `./mach build -d` does not report any errors
- [ ] `./mach test-tidy` does not report any errors
- [ ] These changes fix #24747 (GitHub issue number if applicable)

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- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because ___

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components/script/dom/window.rs

@@ -106,8 +106,7 @@ use script_layout_interface::{PendingImageState, TrustedNodeAddress};
 use script_traits::webdriver_msg::{WebDriverJSError, WebDriverJSResult};
 use script_traits::{ConstellationControlMsg, DocumentState, HistoryEntryReplacement, LoadData};
 use script_traits::{
-    ScriptMsg, ScriptToConstellationChan, ScrollState, StructuredSerializedData, TimerEvent,
-    TimerEventId,
+    ScriptMsg, ScriptToConstellationChan, ScrollState, StructuredSerializedData, TimerEventId,
 };
 use script_traits::{TimerSchedulerMsg, WindowSizeData, WindowSizeType};
 use selectors::attr::CaseSensitivity;
@@ -2206,7 +2205,6 @@ impl Window {
         constellation_chan: ScriptToConstellationChan,
         control_chan: IpcSender<ConstellationControlMsg>,
         scheduler_chan: IpcSender<TimerSchedulerMsg>,
-        timer_event_chan: IpcSender<TimerEvent>,
         layout_chan: Sender<Msg>,
         pipelineid: PipelineId,
         parent_info: Option<PipelineId>,
@@ -2250,7 +2248,6 @@ impl Window {
                 constellation_chan,
                 scheduler_chan,
                 resource_threads,
-                timer_event_chan,
                 origin,
                 microtask_queue,
                 is_headless,