Dispose the tiles removed from the cache

[fredj]

And register the map's goog.dom.ViewportSizeMonitor to be automatically disposed.

[tschaub]

Are you seeing any leaks that are addressed by this? It would be good to be able to point people to a fix when we encounter similar problems elsewhere.

In any case, this looks good to me to merge.

[fredj]

No, I don't see any leaks with the tiles because the cache (ol.TileCache) is so big (2048 entries) that the tiles are never freed.

[ahocevar]

Is it really necessary to call dispose() manually? I thought the Closure library does this internally. Thanks for any clarification I could get on this.

[fredj]

It's not needed if the disposed object has not "open resources" (event listener, ...) to release.

[ahocevar]

I see @fredj. So it's probably a good idea here to manually dispose(), so we don't have to remove listeners manually.

[fredj]

The tiles have no resources to release but it's probably a good practice to call dispose anyway