Remove IPC::Endpoint.

ipc/ipc_endpoint.cc

Index: ipc/ipc_endpoint.cc
diff --git a/ipc/ipc_endpoint.cc b/ipc/ipc_endpoint.cc
deleted file mode 100644
index f613df2c25edc9cb89ee8ecc2b41935eccd8b00c..0000000000000000000000000000000000000000
--- a/ipc/ipc_endpoint.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ipc/ipc_endpoint.h"
-
-namespace IPC {
-
-Endpoint::Endpoint() : attachment_broker_endpoint_(false) {}
-
-void Endpoint::SetAttachmentBrokerEndpoint(bool is_endpoint) {
-  if (is_endpoint != attachment_broker_endpoint_) {
-    attachment_broker_endpoint_ = is_endpoint;
-    OnSetAttachmentBrokerEndpoint();
-  }
-}
-
-}  // namespace IPC