RPP: Keep dur on StubScriptCatchup events

Without dur, traceviewer/perfetto render these traces really poorly.

Change-Id: I8d172ca986aa391e4298409c7edf10c69f7d4f3d
Bug: none
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6852573
Auto-Submit: Paul Irish <[email protected]>
Commit-Queue: Connor Clark <[email protected]>
Reviewed-by: Connor Clark <[email protected]>

Author: paulirish

front_end/panels/timeline/TimelinePanel.test.ts

@@ -427,6 +427,13 @@ describeWithEnvironment('TimelinePanel', function() {
         const file = await contentDataToFile(contentData);
         assert.isUndefined(file.metadata.enhancedTraceVersion);
         assert.deepEqual(file.traceEvents, traceEvents);
+
+        // All `StubScriptCatchup` should have durations
+        for (const event of file.traceEvents) {
+          if (event.name === 'StubScriptCatchup') {
+            assert.isDefined(event.dur);
+          }
+        }
       });
 
       it('saves a CPU profile trace file', async function() {

front_end/panels/timeline/TimelinePanel.ts

@@ -1356,6 +1356,7 @@ export class TimelinePanel extends Common.ObjectWrapper.eventMixin<EventTypes, t
             cat: event.cat,
             name: 'StubScriptCatchup',
             ts: event.ts,
+            dur: event.dur,
             ph: event.ph,
             pid: event.pid,
             tid: event.tid,