limit size of browser disk cache

[Bill Filler]

The browser should limit the size of the disk cache, through a setting with an option to clear it as well:

- need internals to honor the setting when writing to the cache
- need a setting specifying the cache size limit
- need a setting to explicitly clear the cache

[Olivier Tilloy (osomon)]

According to bug #1277659, there is already a hardcoded limit of 80MB. To make this a configurable setting, we’ll need an additional API in oxide.

[Alexandre Abreu (abreu-alexandre)]

@Olivier: this is a cache size that wraps all the cached data (local storage, application cache, etc.) or "only" the network related cache? (my impression is that it is the later, in which case we might need a more global fallback solution),

[Olivier Tilloy (osomon)]

I don’t know, I’d need to look into the actual implementation in depth (or ask Chris).

[Olivier Tilloy (osomon)]

Closing this bug as it’s better tracked by bug #1277659 (for changing the default cache size) and bug #1260014 (to add a way to clear the cache from the settings).