[onpaint.tentative.html]
  [onpaint should fire once if a canvas child changes]
    expected: FAIL

  [onpaint should fire if a canvas child is added or removed]
    expected: FAIL

  [onpaint should fire once if a canvas grandchild changes]
    expected: FAIL

  [onpaint should not fire after canvas child transform changes]
    expected: FAIL

  [onpaint should not fire after canvas drawing operations]
    expected: FAIL

  [onpaint should respect layoutsubtree attribute mutation]
    expected: FAIL

  [onpaint should work with addEventListener]
    expected: FAIL