The 'official' PPA's are in the process of being re-started. In the mean time, there is a workaround at https://help.ubuntu.com/community/Lubuntu/Documentation/FAQ/Workarounds#Chromium_not_Updating
The 'official' PPA's are in the process of being re-started. In the mean time, there is a workaround at https:/ /help.ubuntu. com/community/ Lubuntu/ Documentation/ FAQ/Workarounds #Chromium_ not_Updating