imgIContainerDebug

This interface is used in debug builds (and only there) in
order to let automatic tests running JavaScript access
internal state of imgContainers. This lets us test
things like animation.

Attributes

framesNotified

The # of frames this imgContainer has been notified about.
That is equal to the # of times the animation timer has
fired, and is usually equal to the # of frames actually
drawn (but actual drawing might be disabled).