Both your capturePhoto() and capturePhotoEdit() functions need to have the destinationType updated.

navigator.camera.getPicture(
    onPhotoDataSuccess,
    onFail,
    {
        quality: 50,
        destinationType.DATA_URL
    }
);

should be like this,

navigator.camera.getPicture(
    onPhotoDataSuccess,
    onFail,
    {
        quality: 50,
        destinationType: destinationType.DATA_URL
    }
);