Bug 1043557 - Confirmation message is needed when clearing all the entri...

...es in the Call Log of the Loop Mobile application r=ferjm
Looking at this code, it seems that we could have avoided adding `deleteRevokedUrls` to `ActoinLogDB`. You are already selecting revoked urls and the calling `_deleteUrls` with the list of revoked urls, which is essentially what the action DB function does, right?