This is a testharness.js-based test.
[FAIL] CaptureController interface: existence and properties of interface object
  assert_own_property: self does not have own property "CaptureController" expected property "CaptureController" missing
[FAIL] CaptureController interface object length
  assert_own_property: self does not have own property "CaptureController" expected property "CaptureController" missing
[FAIL] CaptureController interface object name
  assert_own_property: self does not have own property "CaptureController" expected property "CaptureController" missing
[FAIL] CaptureController interface: existence and properties of interface prototype object
  assert_own_property: self does not have own property "CaptureController" expected property "CaptureController" missing
[FAIL] CaptureController interface: existence and properties of interface prototype object's "constructor" property
  assert_own_property: self does not have own property "CaptureController" expected property "CaptureController" missing
[FAIL] CaptureController interface: existence and properties of interface prototype object's @@unscopables property
  assert_own_property: self does not have own property "CaptureController" expected property "CaptureController" missing
[FAIL] CaptureController interface: operation setFocusBehavior(CaptureStartFocusBehavior)
  assert_own_property: self does not have own property "CaptureController" expected property "CaptureController" missing
[FAIL] CaptureController interface: attribute oncapturedmousechange
  assert_own_property: self does not have own property "CaptureController" expected property "CaptureController" missing
[FAIL] CapturedMouseEvent interface: existence and properties of interface object
  assert_own_property: self does not have own property "CapturedMouseEvent" expected property "CapturedMouseEvent" missing
[FAIL] CapturedMouseEvent interface object length
  assert_own_property: self does not have own property "CapturedMouseEvent" expected property "CapturedMouseEvent" missing
[FAIL] CapturedMouseEvent interface object name
  assert_own_property: self does not have own property "CapturedMouseEvent" expected property "CapturedMouseEvent" missing
[FAIL] CapturedMouseEvent interface: existence and properties of interface prototype object
  assert_own_property: self does not have own property "CapturedMouseEvent" expected property "CapturedMouseEvent" missing
[FAIL] CapturedMouseEvent interface: existence and properties of interface prototype object's "constructor" property
  assert_own_property: self does not have own property "CapturedMouseEvent" expected property "CapturedMouseEvent" missing
[FAIL] CapturedMouseEvent interface: existence and properties of interface prototype object's @@unscopables property
  assert_own_property: self does not have own property "CapturedMouseEvent" expected property "CapturedMouseEvent" missing
[FAIL] CapturedMouseEvent interface: attribute surfaceX
  assert_own_property: self does not have own property "CapturedMouseEvent" expected property "CapturedMouseEvent" missing
[FAIL] CapturedMouseEvent interface: attribute surfaceY
  assert_own_property: self does not have own property "CapturedMouseEvent" expected property "CapturedMouseEvent" missing
Harness: the test ran to completion.