This also removes any redundant Ci.nsISupports elements in the interface
lists.
This was done using the following script:
acecb401b7/processors/chromeutils-generateQI.jsm
MozReview-Commit-ID: AIx10P8GpZY
The OfflineAppCacheHelper was apparently introduced after the Sanitizer had been
forked for Fennec and so far nobody bothered to use it there as well.
MozReview-Commit-ID: 42Uk5hfvf9y
site.principals is not always guaranteed to contain elements, only if
the site has quota storage or AppCache. This patch simplifies the function
to use hosts instead.
This commit is in preparation of using SiteDataManager in the page info
window to display site data information for a individual hosts.
MozReview-Commit-ID: 3YmUZInvoAT