lock element that is not in fullscreen mode stack

nsDOMMouseLockable::Lock

nsMouseLockableRequest::nsMouseLockableRequest

Calling ShouldLock..

nsDOMMouseLockable::ShouldLock

Element is in the DOM Tree

Element is no int fullscreen mode, returning false...

Dispatching failure callback to main thread

nsRequestMouseLockEvent::nsRequestMouseLockEvent

Failure request dispatched

Returning from lock

RequestAllowMouseLockEvent::Run

nsMouseLockableRequest::SendFailure