Revert of Remove IPC::BrokerableAttachment.

ipc/handle_attachment_win.cc

 // 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/handle_attachment_win.h"
 
 #include <windows.h>
 
 namespace IPC {
 namespace internal {
@@ skipping 10 matching lines @@
   if (result) {
     handle_ = duplicated_handle;
     permissions_ = permissions;
   }
 }
 
 HandleAttachmentWin::HandleAttachmentWin(const HANDLE& handle,
                                          FromWire from_wire)
     : handle_(handle), permissions_(HandleWin::INVALID), owns_handle_(true) {}
 
+HandleAttachmentWin::HandleAttachmentWin(const WireFormat& wire_format)
+    : handle_(LongToHandle(wire_format.handle)),
+      permissions_(wire_format.permissions),
+      owns_handle_(true) {}
+
 HandleAttachmentWin::~HandleAttachmentWin() {
   if (handle_ != INVALID_HANDLE_VALUE && owns_handle_)
     ::CloseHandle(handle_);
 }
 
-MessageAttachment::Type HandleAttachmentWin::GetType() const {
-  return Type::WIN_HANDLE;
+HandleAttachmentWin::BrokerableType HandleAttachmentWin::GetBrokerableType()
+    const {
+  return WIN_HANDLE;
+}
+
+HandleAttachmentWin::WireFormat HandleAttachmentWin::GetWireFormat(
+    const base::ProcessId& destination) const {
+  return WireFormat(HandleToLong(handle_), destination, permissions_);
 }
 
 }  // namespace internal
 }  // namespace IPC