Update ChannelReader to use AttachmentBroker.

ipc/ipc_message.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_message.h"
 
 #include "base/atomic_sequence_num.h"
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "ipc/ipc_message_attachment.h"
@@ skipping 55 matching lines @@
   Init();
 }
 
 Message::Message(const char* data, int data_len)
     : base::Pickle(data, data_len) {
   Init();
 }
 
 Message::Message(const Message& other) : base::Pickle(other) {
   Init();
-#if defined(OS_POSIX)
   attachment_set_ = other.attachment_set_;
-#endif
 }
 
 void Message::Init() {
   dispatch_error_ = false;
 #ifdef IPC_MESSAGE_LOG_ENABLED
   received_time_ = 0;
   dont_log_ = false;
   log_data_ = NULL;
 #endif
 }
 
 Message& Message::operator=(const Message& other) {
   *static_cast<base::Pickle*>(this) = other;
-#if defined(OS_POSIX)
   attachment_set_ = other.attachment_set_;
-#endif
   return *this;
 }
 
 void Message::SetHeaderValues(int32 routing, uint32 type, uint32 flags) {
   // This should only be called when the message is already empty.
   DCHECK(payload_size() == 0);
 
   header()->routing = routing;
   header()->type = type;
   header()->flags = flags;
@@ skipping 54 matching lines @@
 bool Message::HasMojoHandles() const {
   return attachment_set_.get() && attachment_set_->num_mojo_handles() > 0;
 }
 
 bool Message::HasBrokerableAttachments() const {
   return attachment_set_.get() &&
          attachment_set_->num_brokerable_attachments() > 0;
 }
 
 }  // namespace IPC