Tests stepping out from custom element callbacks.

Set timer for test function.
Call stack:
    0) FooElement (debugger-step-out-custom-element-callbacks.js:25)
    1) testFunction (debugger-step-out-custom-element-callbacks.js:43)
    [setTimeout]
    0) scheduleTestFunction <omitted>
    <... skipped remaining frames ...>

Executing StepOut...
Call stack:
    0) testFunction (debugger-step-out-custom-element-callbacks.js:44)
    [setTimeout]
    0) scheduleTestFunction <omitted>
    <... skipped remaining frames ...>

Executing StepInto...
Call stack:
    0) attributeChangedCallback (debugger-step-out-custom-element-callbacks.js:38)
    1) testFunction (debugger-step-out-custom-element-callbacks.js:44)
    [setTimeout]
    0) scheduleTestFunction <omitted>
    <... skipped remaining frames ...>

Executing StepOut...
Call stack:
    0) testFunction (debugger-step-out-custom-element-callbacks.js:45)
    [setTimeout]
    0) scheduleTestFunction <omitted>
    <... skipped remaining frames ...>

Executing StepInto...
Call stack:
    0) connectedCallback (debugger-step-out-custom-element-callbacks.js:29)
    1) testFunction (debugger-step-out-custom-element-callbacks.js:45)
    [setTimeout]
    0) scheduleTestFunction <omitted>
    <... skipped remaining frames ...>

Executing StepOut...
Call stack:
    0) testFunction (debugger-step-out-custom-element-callbacks.js:46)
    [setTimeout]
    0) scheduleTestFunction <omitted>
    <... skipped remaining frames ...>

Executing StepInto...
Call stack:
    0) disconnectedCallback (debugger-step-out-custom-element-callbacks.js:32)
    1) testFunction (debugger-step-out-custom-element-callbacks.js:46)
    [setTimeout]
    0) scheduleTestFunction <omitted>
    <... skipped remaining frames ...>

Executing StepOut...
Call stack:
    0) testFunction (debugger-step-out-custom-element-callbacks.js:47)
    [setTimeout]
    0) scheduleTestFunction <omitted>
    <... skipped remaining frames ...>

[page] Invoked constructor.
[page] Invoked attributeChangedCallback.
[page] Invoked connectedCallback.
[page] Invoked disconnectedCallback.