Revert of Reland #2 "ipc: Add a new field num_brokered_attachments to the message header."

ipc/ipc_channel_common.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 "ipc/ipc_channel.h"
 
 namespace IPC {
 
-static Channel::MessageVerifier g_message_verifier = nullptr;
-
 // static
 scoped_ptr<Channel> Channel::CreateClient(
     const IPC::ChannelHandle& channel_handle,
     Listener* listener,
     AttachmentBroker* broker) {
   return Channel::Create(channel_handle, Channel::MODE_CLIENT, listener,
                          broker);
 }
 
 // static
@@ skipping 30 matching lines @@
     const IPC::ChannelHandle& channel_handle,
     Listener* listener,
     AttachmentBroker* broker) {
   return Channel::Create(channel_handle, Channel::MODE_SERVER, listener,
                          broker);
 }
 
 Channel::~Channel() {
 }
 
-// static
-void Channel::SetMessageVerifier(MessageVerifier verifier) {
-  g_message_verifier = verifier;
-}
-
-// static
-Channel::MessageVerifier Channel::GetMessageVerifier() {
-  return g_message_verifier;
-}
-
 bool Channel::IsSendThreadSafe() const {
   return false;
 }
 
 }  // namespace IPC