Secondary TileCaches shouldn't unparent offscreen tiles, because m_isInWindow is inaccurate (never set to true) for them, so the entirety of this feature doesn't work.
Created attachment 181572 [details]
Comment on attachment 181572 [details]
View in context: https://bugs.webkit.org/attachment.cgi?id=181572&action=review
> + the TileCache should unparent offscreen tiles. We can't use this behavior for secondary TileCaches
Let's call these something other than "secondary". How about "tiled layer TileCaches".
*** Bug 106205 has been marked as a duplicate of this bug. ***
*** Bug 106265 has been marked as a duplicate of this bug. ***