Use two forks to shred the chicken. Then stir in the frozen corn and peas. In a small measuring glass, whisk together the flour and the cream until it's relatively smooth, then stir that mixture into the slow cooker. Place the lid back on and let it cook for another 45-60 minutes, until it has thickened up and the flour taste has cooked off. Taste for any additional seasoning you'd like to add, then serve.