IPC: Make ChannelReader inherit from SupportsAttachmentBrokering.

ipc/ipc_channel_proxy_unittest.cc

 // Copyright 2014 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 "base/pickle.h"
 #include "base/threading/thread.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_test_base.h"
@@ skipping 405 matching lines @@
   EXPECT_TRUE(DidListenerGetBadMessage());
 }
 #endif
 
 #endif
 
 MULTIPROCESS_IPC_TEST_CLIENT_MAIN(ChannelProxyClient) {
   base::MessageLoopForIO main_message_loop;
   ChannelReflectorListener listener;
   scoped_ptr<IPC::Channel> channel(IPC::Channel::CreateClient(
-      IPCTestBase::GetChannelName("ChannelProxyClient"),
-      &listener));
+      IPCTestBase::GetChannelName("ChannelProxyClient"), &listener, nullptr));
   CHECK(channel->Connect());
   listener.Init(channel.get());
 
   base::MessageLoop::current()->Run();
   return 0;
 }
 
 }  // namespace