Clean up public interface of AttachmentBrokerUnprivileged.

ipc/attachment_broker.cc

Index: ipc/attachment_broker.cc
diff --git a/ipc/attachment_broker.cc b/ipc/attachment_broker.cc
index 50e3e2d9ae74faae5ab3050cae4ab88ee4207c17..b463356af766473abb800823d1886f572004bce9 100644
--- a/ipc/attachment_broker.cc
+++ b/ipc/attachment_broker.cc
@@ -82,6 +82,15 @@ void AttachmentBroker::DeregisterCommunicationChannel(Endpoint* endpoint) {
   NOTREACHED();
 }
 
+void AttachmentBroker::DesignateBrokerCommunicationChannel(Endpoint* endpoint) {
+  NOTREACHED();
+}
+
+bool AttachmentBroker::IsPrivilegedBroker() {
+  NOTREACHED();
+  return false;
+}
+
 void AttachmentBroker::HandleReceivedAttachment(
     const scoped_refptr<BrokerableAttachment>& attachment) {
   {