servo: Merge #18324 - Make Performance Timeline API work in Workers (from ferjm:performance.workers); r=jdm

- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #18286 and #18308

This patch makes the Performance Timeline API work in workers, removes the exposure of `Performance.timing` in workers and sets the appropriate value of `Performance.now()` in workers.

Source-Repo: https://github.com/servo/servo
Source-Revision: 42de8e3d3fe8927b4730a7a42880eb46f743384a

servo/components/script/script_thread.rs

@@ -118,7 +118,7 @@ use task_source::dom_manipulation::{DOMManipulationTask, DOMManipulationTaskSour
 use task_source::file_reading::FileReadingTaskSource;
 use task_source::history_traversal::HistoryTraversalTaskSource;
 use task_source::networking::NetworkingTaskSource;
-use task_source::performance_timeline::{PerformanceTimelineTask, PerformanceTimelineTaskSource};
+use task_source::performance_timeline::PerformanceTimelineTaskSource;
 use task_source::user_interaction::{UserInteractionTask, UserInteractionTaskSource};
 use time::{get_time, precise_time_ns, Tm};
 use url::Position;
@@ -272,8 +272,6 @@ pub enum MainThreadScriptMsg {
     /// Notifies the script thread that a new worklet has been loaded, and thus the page should be
     /// reflowed.
     WorkletLoaded(PipelineId),
-    /// Tasks that originate from the performance timeline task source.
-    PerformanceTimeline(PerformanceTimelineTask),
 }
 
 impl OpaqueSender<CommonScriptMsg> for Box<ScriptChan + Send> {
@@ -860,9 +858,9 @@ impl ScriptThread {
             dom_manipulation_task_source: DOMManipulationTaskSource(chan.clone()),
             user_interaction_task_source: UserInteractionTaskSource(chan.clone()),
             networking_task_source: NetworkingTaskSource(boxed_script_sender.clone()),
-            history_traversal_task_source: HistoryTraversalTaskSource(chan.clone()),
-            file_reading_task_source: FileReadingTaskSource(boxed_script_sender),
-            performance_timeline_task_source: PerformanceTimelineTaskSource(chan),
+            history_traversal_task_source: HistoryTraversalTaskSource(chan),
+            file_reading_task_source: FileReadingTaskSource(boxed_script_sender.clone()),
+            performance_timeline_task_source: PerformanceTimelineTaskSource(boxed_script_sender),
 
             control_chan: state.control_chan,
             control_port: control_port,
@@ -1192,6 +1190,7 @@ impl ScriptThread {
                 ScriptThreadEventCategory::ServiceWorkerEvent => ProfilerCategory::ScriptServiceWorkerEvent,
                 ScriptThreadEventCategory::EnterFullscreen => ProfilerCategory::ScriptEnterFullscreen,
                 ScriptThreadEventCategory::ExitFullscreen => ProfilerCategory::ScriptExitFullscreen,
+                ScriptThreadEventCategory::PerformanceTimelineTask => ProfilerCategory::ScriptPerformanceEvent,
             };
             profile(profiler_cat, None, self.time_profiler_chan.clone(), f)
         } else {
@@ -1295,8 +1294,6 @@ impl ScriptThread {
                 self.handle_worklet_loaded(pipeline_id),
             MainThreadScriptMsg::DOMManipulation(task) =>
                 task.handle_task(self),
-            MainThreadScriptMsg::PerformanceTimeline(task) =>
-                task.handle_task(self),
             MainThreadScriptMsg::UserInteraction(task) =>
                 task.handle_task(self),
         }
@@ -2009,7 +2006,6 @@ impl ScriptThread {
         let DOMManipulationTaskSource(ref dom_sender) = self.dom_manipulation_task_source;
         let UserInteractionTaskSource(ref user_sender) = self.user_interaction_task_source;
         let HistoryTraversalTaskSource(ref history_sender) = self.history_traversal_task_source;
-        let PerformanceTimelineTaskSource(ref performance_sender) = self.performance_timeline_task_source;
 
         let (ipc_timer_event_chan, ipc_timer_event_port) = ipc::channel().unwrap();
         ROUTER.route_ipc_receiver_to_mpsc_sender(ipc_timer_event_port,
@@ -2034,7 +2030,7 @@ impl ScriptThread {
                                  self.networking_task_source.clone(),
                                  HistoryTraversalTaskSource(history_sender.clone()),
                                  self.file_reading_task_source.clone(),
-                                 PerformanceTimelineTaskSource(performance_sender.clone()),
+                                 self.performance_timeline_task_source.clone(),
                                  self.image_cache_channel.clone(),
                                  self.image_cache.clone(),
                                  self.resource_threads.clone(),