The XPCOM thread object implements this interface, which allows a consumer
 to observe dispatch activity on the thread.
[scriptable, uuid(f89b5063-b06d-42f8-bf23-4dfcf2d80d6a)]
interface nsIThreadInternal : nsIThread

Attributes

 Get/set the current thread observer (may be null).  This attribute may be
 read from any thread, but must only be set on the thread corresponding to
 this thread object.  The observer will be released on the thread
 corresponding to this thread object after all other events have been
 processed during a call to Shutdown.
attribute nsIThreadObserver observer

Methods

 Revert a call to PushEventQueue.  When an event queue is popped, any
 events remaining in the queue are appended to the elder queue.
void popEventQueue() 
 This method causes any events currently enqueued on the thread to be
 suppressed until PopEventQueue is called.  Additionally, any new events
 dispatched to the thread will only be processed if they are accepted by
 the given filter.  If the filter is null, then new events are accepted.
 Calls to PushEventQueue may be nested and must each be paired with a call
 to PopEventQueue in order to restore the original state of the thread.

 @param filter
   The thread event filter to apply to dispatched events, or null to accept
   all dispatched events.
void pushEventQueue(in nsIThreadEventFilter filter)