Cookies disabled for DeviceManagementService.

Following discussion in https://codereview.chromium.org/2800653002, cookies
are disabled for network request of:
components/policy/core/common/cloud/device_management_service.cc

BUG=

Review-Url: https://codereview.chromium.org/2837123005
Cr-Commit-Position: refs/heads/master@{#467280}
1 file changed