[brand-checks.html]
  [Can get the ReadableStreamReader constructor indirectly]
    expected: FAIL

  [ReadableStreamReader.prototype.closed enforces a brand check]
    expected: FAIL

  [ReadableStreamReader.prototype.cancel enforces a brand check]
    expected: FAIL

  [ReadableStreamReader.prototype.read enforces a brand check]
    expected: FAIL

  [ReadableStreamReader.prototype.releaseLock enforces a brand check]
    expected: FAIL