web_canvaskit_tests postsubmits recently became very flaky due to timeouts

[b-luk]

Frequently turns the tree red.

Started around 3c5c58d, from July 9, 9:56AM PDT.

https://flutter-dashboard.appspot.com/#/build?repo=flutter&taskFilter=canvaskit&branch=master

[jmagman]

They are timing out, web team should take a look.

[jmagman]

The web_skwasm_ tests are also very flaky, at least one is flaking on almost every commit and PR.

[kevmoo]

FYI: I bet this is related to the Chrome 145 roll.

#182861

[flutter-zl]

harryterkelsen mentions the following in #189471.

A performance regression was observed in the web_benchmarks_ddc_hot_reload benchmark for the metric bench_card_infinite_scroll_backward.canvaskit.drawFrameDuration.average.

Regression Details

• Benchmark Test: web_benchmarks_ddc_hot_reload
• Metric: bench_card_infinite_scroll_backward.canvaskit.drawFrameDuration.average
• LUCI Perf Chart: LUCI Perf Link

Suspected Culprit

The regression appears around the time the Chrome 145 roll landed:

• PR: #182861 — [web] Roll Chrome to 145 (framework)
• Commit: 37b8446

This issue is filed to investigate the cause of the draw frame duration regression and resolve it.