IPC: Fix attachment brokering race condition.

remoting/host/win/unprivileged_process_delegate.cc

 
 // Copyright (c) 2012 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.
 //
 // This file implements the Windows service controlling Me2Me host processes
 // running within user sessions.
 
 #include "remoting/host/win/unprivileged_process_delegate.h"
 
@@ skipping 319 matching lines @@
     if (!LaunchProcessWithToken(
             command_line.GetProgram(), command_line.GetCommandLineString(),
             token.Get(), &process_attributes, &thread_attributes, true, 0,
             nullptr, &worker_process, &worker_thread)) {
       ReportFatalError();
       return;
     }
   }
 
   channel_ = std::move(server);
-  IPC::AttachmentBroker::GetGlobal()->RegisterCommunicationChannel(
-      channel_.get(), io_task_runner_);
 
   ReportProcessLaunched(std::move(worker_process));
 }
 
 void UnprivilegedProcessDelegate::Send(IPC::Message* message) {
   DCHECK(CalledOnValidThread());
 
   if (channel_) {
     channel_->Send(message);
   } else {
@@ skipping 80 matching lines @@
     PLOG(ERROR) << "Failed to duplicate a handle";
     ReportFatalError();
     return;
   }
   ScopedHandle limited_handle(temp_handle);
 
   event_handler_->OnProcessLaunched(std::move(limited_handle));
 }
 
 }  // namespace remoting