text: setup({"hide_test_state": true});
  async_test(t => {
    assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");
    // First observer creates a second one in the callback to ensure the entry has been dispatched
    // by the time the second observer begins observing.
    new PerformanceObserver(entries => {
      const entry_seen = entries.getEntriesByName('first-contentful-paint').length > 0;
      // Abort if we have not yet received the entry.
      if (!entry_seen)
        return;
  
      // Second observer requires 'buffered: true' to see the entry.
      new PerformanceObserver(t.step_func_done(list => {
          const fcp = list.getEntriesByName('first-contentful-paint');
          assert_equals(fcp.length, 1, 'Should have an fcp entry');
          const entry = fcp[0];
          assert_equals(entry.entryType, 'paint');
        })).observe({'type': 'paint', buffered: true});
    }).observe({'entryTypes': ['paint']});
    // Trigger the first contentful paint entry.
    const img = document.createElement("img");
    img.src = "resources/circles.png";
    document.body.appendChild(img);
  }, "PerformanceObserver with buffered flag sees previous FCP entry.");
  