IPC: Add new classes required for attachment brokering.

ipc/attachment_broker_win.cc

Index: ipc/attachment_broker_win.cc
diff --git a/ipc/attachment_broker_win.cc b/ipc/attachment_broker_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0f281068c13105be9d13f7b781bff7a0b9d6b478
--- /dev/null
+++ b/ipc/attachment_broker_win.cc
@@ -0,0 +1,33 @@
+// 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/attachment_broker_win.h"
+
+namespace IPC {
+
+AttachmentBrokerWin::AttachmentBrokerWin() {
+}
+
+AttachmentBrokerWin::~AttachmentBrokerWin() {
+}
+
+void AttachmentBrokerWin::OnReceiveDuplicatedHandle(HANDLE,
+                                                    BrokerableAttachmentId id) {
+  // TODO(erikchen): Implement me. http://crbug.com/493414
+}
+
+void AttachmentBrokerWin::SendAttachmentToProcess(
+    BrokerableAttachment* attachment,
+    base::ProcessId destination_process) {
+  // TODO(erikchen): Implement me. http://crbug.com/493414
+}
+
+bool AttachmentBrokerWin::GetAttachmentWithId(
+    BrokerableAttachmentId id,
+    BrokerableAttachment* attachment) {
+  // TODO(erikchen): Implement me. http://crbug.com/493414
+  return false;
+}
+
+}  // namespace IPC