ipc: Remove unnecessary attachment broker plumbing.

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 328 matching lines @@
 
 int CommonPrivilegedProcessMain(OnMessageReceivedCallback callback,
                                 const char* channel_name) {
   base::MessageLoopForIO main_message_loop;
   ProxyListener listener;
 
   // Set up IPC channel.
   IPC::AttachmentBrokerPrivilegedWin broker;
   IPC::AttachmentBroker::SetGlobal(&broker);
   scoped_ptr<IPC::Channel> channel(IPC::Channel::CreateClient(
-      IPCTestBase::GetChannelName(channel_name), &listener, &broker));
+      IPCTestBase::GetChannelName(channel_name), &listener));
   broker.RegisterCommunicationChannel(channel.get());
   CHECK(channel->Connect());
 
   MockObserver observer;
   broker.AddObserver(&observer);
 
   while (true) {
     base::MessageLoop::current()->Run();
     ProxyListener::Reason reason = listener.get_reason();
     if (reason == ProxyListener::CHANNEL_ERROR)
@@ skipping 64 matching lines @@
 MULTIPROCESS_IPC_TEST_CLIENT_MAIN(SendHandleToSelf) {
   return CommonPrivilegedProcessMain(&SendHandleToSelfCallback,
                                      "SendHandleToSelf");
 }
 
 MULTIPROCESS_IPC_TEST_CLIENT_MAIN(SendHandleWin) {
   return CommonPrivilegedProcessMain(&SendHandleCallback, "SendHandleWin");
 }
 
 }  // namespace