ipc: Update MachPortMac ownership semantics.

ipc/attachment_broker_privileged_win_unittest.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 "build/build_config.h"
 
 #include <windows.h>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 259 matching lines @@
   scoped_ptr<IPC::AttachmentBrokerUnprivilegedWin> broker_;
   MockObserver observer_;
 };
 
 // A broker which always sets the current process as the destination process
 // for attachments.
 class MockBroker : public IPC::AttachmentBrokerUnprivilegedWin {
  public:
   MockBroker() {}
   ~MockBroker() override {}
-  bool SendAttachmentToProcess(const IPC::BrokerableAttachment* attachment,
+  bool SendAttachmentToProcess(IPC::BrokerableAttachment* attachment,
                                base::ProcessId destination_process) override {
     return IPC::AttachmentBrokerUnprivilegedWin::SendAttachmentToProcess(
         attachment, base::Process::Current().Pid());
   }
 };
 
 // An unprivileged process makes a file HANDLE, and writes a string to it. The
 // file HANDLE is sent to the privileged process using the attachment broker.
 // The privileged process dups the HANDLE into its own HANDLE table. This test
 // checks that the file has the same contents in the privileged process.
@@ skipping 262 matching lines @@
     SendControlMessage(sender, success);
   }
 }
 
 MULTIPROCESS_IPC_TEST_CLIENT_MAIN(SendHandleTwice) {
   return CommonPrivilegedProcessMain(&SendHandleTwiceCallback,
                                      "SendHandleTwice");
 }
 
 }  // namespace