Re: [ServiceWorker] How are unloaded tabs represented? (#626)

My take:

I don't think asleep tabs should have an effect on the lifecycle within a registration. These tabs are going to reload anyway, having them reload with an updated version seems fine. Given that tab-management is pretty much a lost art in Android L, you'd very easily end up with old forgotten tabs preventing updates becoming active.

Having asleep tabs show up in `clients.getAll()` is somewhat desirable, as following a push message you can focus one of these existing tabs rather than opening a new one. However, given that tab management isn't really a thing anymore in Android L, maybe it doesn't matter if you open a new window vs focusing an asleep one. I don't think there's a performance benefit.

(I realise this is a bit Android-specific, so interested in hearing from other vendors)

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