ipc: Remove unnecessary attachment broker plumbing.

ipc/ipc_channel_nacl.h

 // 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.
 
 #ifndef IPC_IPC_CHANNEL_NACL_H_
 #define IPC_IPC_CHANNEL_NACL_H_
 
 #include <deque>
 #include <string>
 
@@ skipping 17 matching lines @@
 // NaClDescCustom. See NaClIPCAdapter for the trusted-side implementation.
 //
 // We don't need to worry about complicated set up and READWRITE mode for
 // sharing handles. We also currently do not support passing file descriptors or
 // named pipes, and we use background threads to emulate signaling when we can
 // read or write without blocking.
 class ChannelNacl : public Channel,
                     public internal::ChannelReader {
  public:
   // Mirror methods of Channel, see ipc_channel.h for description.
-  // |broker| must outlive the newly created object.
   ChannelNacl(const IPC::ChannelHandle& channel_handle,
               Mode mode,
-              Listener* listener,
-              AttachmentBroker* broker);
+              Listener* listener);
   ~ChannelNacl() override;
 
   // Channel implementation.
   base::ProcessId GetPeerPID() const override;
   base::ProcessId GetSelfPID() const override;
   bool Connect() override;
   void Close() override;
   bool Send(Message* message) override;
   AttachmentBroker* GetAttachmentBroker() override;
 
@@ skipping 66 matching lines @@
   std::deque<linked_ptr<Message> > output_queue_;
 
   base::WeakPtrFactory<ChannelNacl> weak_ptr_factory_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ChannelNacl);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_NACL_H_