[autoplay-hidden.optional.html]
  expected:
    if (os == "linux") and (processor == "x86_64") and not debug and not asan and not tsan: [OK, TIMEOUT]
    if (os == "linux") and (processor == "x86"): [OK, TIMEOUT]
    if (os == "android") and not debug: [OK, ERROR]
    if os == "win": [OK, TIMEOUT]
    if os == "mac": [OK, TIMEOUT]
  [Allow delaying autoplay until video elements become visible]
    expected:
      if (os == "linux") and (processor == "x86_64") and not debug and not asan and not tsan: [PASS, TIMEOUT]
      if (os == "linux") and (processor == "x86"): [PASS, TIMEOUT]
      if os == "win": [PASS, TIMEOUT]
      if os == "mac": [PASS, TIMEOUT]