ipc: Use a global for the process's attachment broker.

ipc/ipc_channel_nacl.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.
 
 #include "ipc/ipc_channel_nacl.h"
 
 #include <errno.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <sys/types.h>
@@ skipping 112 matching lines @@
 
 ChannelNacl::ChannelNacl(const IPC::ChannelHandle& channel_handle,
                          Mode mode,
                          Listener* listener,
                          AttachmentBroker* broker)
     : ChannelReader(listener),
       mode_(mode),
       waiting_connect_(true),
       pipe_(-1),
       pipe_name_(channel_handle.name),
-      weak_ptr_factory_(this),
-      broker_(broker) {
+      weak_ptr_factory_(this) {
   if (!CreatePipe(channel_handle)) {
     // The pipe may have been closed already.
     const char *modestr = (mode_ & MODE_SERVER_FLAG) ? "server" : "client";
     LOG(WARNING) << "Unable to create pipe named \"" << channel_handle.name
                  << "\" in " << modestr << " mode";
   }
 }
 
 ChannelNacl::~ChannelNacl() {
   CleanUp();
@@ skipping 73 matching lines @@
                          message->header()->flags,
                          TRACE_EVENT_FLAG_FLOW_OUT);
   output_queue_.push_back(linked_ptr<Message>(message_ptr.release()));
   if (!waiting_connect_)
     return ProcessOutgoingMessages();
 
   return true;
 }
 
 AttachmentBroker* ChannelNacl::GetAttachmentBroker() {
-  return broker_;
+  return nullptr;
 }
 
 void ChannelNacl::DidRecvMsg(scoped_ptr<MessageContents> contents) {
   // Close sets the pipe to -1. It's possible we'll get a buffer sent to us from
   // the reader thread after Close is called. If so, we ignore it.
   if (pipe_ == -1)
     return;
 
   linked_ptr<std::vector<char> > data(new std::vector<char>);
   data->swap(contents->data);
@@ skipping 160 matching lines @@
 // static
 scoped_ptr<Channel> Channel::Create(const IPC::ChannelHandle& channel_handle,
                                     Mode mode,
                                     Listener* listener,
                                     AttachmentBroker* broker) {
   return scoped_ptr<Channel>(
       new ChannelNacl(channel_handle, mode, listener, broker));
 }
 
 }  // namespace IPC