Use full URL for urlToShred when use content settings for shields on iOS feature flag is enabled. This will have no change as `domainURL` will match the domain pattern that shred uses, but cleaning up usage of `domainURL`.
Use full URL for urlToShred when use content settings for shields on iOS feature flag is enabled. This will have no change as `domainURL` will match the domain pattern that shred uses, but cleaning up usage of `domainURL`.