Update deleting autofill data in Chrome-like browsers.

[rados]

No description provided.

[az0]

@rados Thank you for working on this.

If a user has an old database version, probably because he uninstalled a Chrome-based browser before it updated the database, then the new code will keep erroring on the old database, so a solution would be to modify __shred_sqlite_char_columns() to check that each column exists like __sqlite_table_exists().

Let me know the next time you can work on this, and depending on our schedules, I may work on it.

For now, I will ask some users (with the new database) to test this.

[rados]

@az0 Yes, I've missed this case, thank you. According to my observations the whole tables 'local_addresses' and 'local_addresses_type_tokens' are part of the new db, so it will be enough to check if the tables exist. I can push this change quickly.