Comment 3 for bug 168261

I don't think it makes sense to "decode" an SVG image in to an nsIImage. Things
like animation, etc won't work if you do this (without a huge amount of extra
work). If we really want this to work, i'd guess that changes similar to those
in the object frame would have to go in to image frame. That kinda sucks though
and isn't very flexable...