Stable unexpected results (1): 
  ▶ OK /paint-timing/with-first-paint/first-image-child.html
  │   ▶ FAIL [expected PASS] Child iframe ignores paint-timing events fired from parent image rendering.
  │   │   → assert_equals: expected "0" but got "1 paint first-paint"
  │   │ 
  │   │ @http://web-platform.test:8000/paint-timing/with-first-paint/first-image-child.html:18:22
  │   │ Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
  └   └ Test.prototype.step_func/<@http://web-platform.test:8000/resources/testharness.js:2916:35