Sets the S3 ACL grants for the given object to the appropriate
        value based on the type of Distribution.  If the Distribution
        is serving private content the ACL will be set to include the
        Origin Access Identity associated with the Distribution.  If
        the Distribution is serving public content the content will
        be set up with "public-read".

        :type object: :class:`boto.cloudfront.object.Object`
        :param enabled: The Object whose ACL is being set

        :type replace: bool
        :param replace: If False, the Origin Access Identity will be
                        appended to the existing ACL for the object.
                        If True, the ACL for the object will be
                        completely replaced with one that grants
                        READ permission to the Origin Access Identity.

def set_permissions(self, object, replace=False):
        """
        Sets the S3 ACL grants for the given object to the appropriate
        value based on the type of Distribution.  If the Distribution
        is serving private content the ACL will be set to include the
        Origin Access Identity associated with the Distribution.  If
        the Distribution is serving public content the content will
        be set up with "public-read".

        :type object: :class:`boto.cloudfront.object.Object`
        :param enabled: The Object whose ACL is being set

        :type replace: bool
        :param replace: If False, the Origin Access Identity will be
                        appended to the existing ACL for the object.
                        If True, the ACL for the object will be
                        completely replaced with one that grants
                        READ permission to the Origin Access Identity.

        """
        if isinstance(self.config.origin, S3Origin):
            if self.config.origin.origin_access_identity:
                id = self.config.origin.origin_access_identity.split('/')[-1]
                oai = self.connection.get_origin_access_identity_info(id)
                policy = object.get_acl()
                if replace:
                    policy.acl = ACL()
                policy.acl.add_user_grant('READ', oai.s3_user_id)
                object.set_acl(policy)
            else:
                object.set_canned_acl('public-read')