RPP: try to de-flake FilmStrip test

The trace that we were using was large and has 20 screenshots, on the
bots this sometimes times out. Swapped it for a much smaller trace with
just 2 screenshots which is still enough to assert what we want.

Bug: none
Change-Id: I98d2471947af748e451138da402b4a0c055b0618
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6349185
Commit-Queue: Philip Pfaffe <[email protected]>
Commit-Queue: Jack Franklin <[email protected]>
Reviewed-by: Nikolay Vitkov <[email protected]>
Reviewed-by: Philip Pfaffe <[email protected]>
Auto-Submit: Jack Franklin <[email protected]>

Author: jackfranklin

front_end/models/trace/extras/FilmStrip.test.ts

@@ -46,13 +46,13 @@ describeWithEnvironment('FilmStrip', function() {
 
   describe('using the new screenshot format', () => {
     it('identifies the frames from a trace', async function() {
-      const {parsedTrace} = await TraceLoader.traceEngine(this, 'web-dev-screenshot-source-ids.json.gz');
+      const {parsedTrace} = await TraceLoader.traceEngine(this, 'example-dot-com.json.gz');
       const filmStrip = Trace.Extras.FilmStrip.fromParsedTrace(parsedTrace);
-      assert.lengthOf(filmStrip.frames, 20);
+      assert.lengthOf(filmStrip.frames, 2);
     });
 
     it('has an array of new screenshot events', async function() {
-      const {parsedTrace} = await TraceLoader.traceEngine(this, 'web-dev-screenshot-source-ids.json.gz');
+      const {parsedTrace} = await TraceLoader.traceEngine(this, 'example-dot-com.json.gz');
       const filmStrip = Trace.Extras.FilmStrip.fromParsedTrace(parsedTrace);
       assert.isTrue(filmStrip.frames.every(f => Trace.Types.Events.isScreenshot(f.screenshotEvent)));
     });

front_end/panels/timeline/fixtures/traces/BUILD.gn

@@ -26,6 +26,7 @@ copy_to_gen("traces") {
     "dom-size-overlap.json.gz",
     "dom-size.json.gz",
     "enhanced-traces.json.gz",
+    "example-dot-com.json.gz",
     "extension-tracks-and-marks.json.gz",
     "fenced-frame-fledge.json.gz",
     "font-display.json.gz",