I contacted the support of blockchain.info
They answer was clear
If i use the key word on a wallet that support Bitcoin Cash i will be able to see my BCC and use it, which means, yes you own the Bitcoin Cash that are in Blockchain.info but you can't see them there, you need to use a different wallet
Thanks for that final clarification of this issue. I was wondering about it for a while,
And here is my question, have you successfully managed to export your private keys to other wallet and use both your BTC and BCC?
I am still scared to dump BCC because I heard that this altcoin possibly has weak reply protection, yet to be seen in action.