Blockchain.info now has BCH support. You can view your BCH balance under Settings -> General.
They have some information about this on the Blockchain Support Center: Bitcoin Cash (BCH).
When logging into your Blockchain wallet you'll receive a notification like this:
From here, if you navigate to Settings -> General and scroll to the bottom, you'll see the following:
Upon clicking 'Show Bitcoin Cash Balance' you'll be shown a dialog message telling you what Bitcoin Cash is, how it's different from Bitcoin and a few other bits of useful info. At the bottom of this dialog box is the following button:
Upon clicking this button you'll be shown another dialog box containing your BCH balance and its current value in your wallet's primary currency.
Here you'll have the option to:
- Keep Bitcoin Cash - Keep it in your Blockchain wallet, available to view at any time under Settings -> General.
- Exchange Bitcoin Cash - Directly exchange it for Bitcoin or Ether.
- Send Bitcoin Cash - Transfer it to a different Bitcoin Cash address.
Dismissing the dialog has the same affect as clicking "Keep Bitcoin Cash"; don't worry though, your Bitcoin Cash balance and both the "Exchange Bitcoin Cash" and "Send Bitcoin Cash" options are now permanently available under Settings -> General.