Delete IPC::ChannelPosix, IPC::ChannelWin and IPC::AttachmentBroker.

ipc/attachment_broker_unprivileged.h

-// Copyright 2015 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_ATTACHMENT_BROKER_UNPRIVILEGED_H_
-#define IPC_ATTACHMENT_BROKER_UNPRIVILEGED_H_
-
-#include "base/macros.h"
-#include "ipc/attachment_broker.h"
-#include "ipc/ipc_export.h"
-
-namespace IPC {
-
-class Endpoint;
-class Sender;
-
-// This abstract subclass of AttachmentBroker is intended for use in
-// non-privileged processes.
-class IPC_EXPORT AttachmentBrokerUnprivileged : public IPC::AttachmentBroker {
- public:
-  AttachmentBrokerUnprivileged();
-  ~AttachmentBrokerUnprivileged() override;
-
-  // If there is no global attachment broker, makes a new
-  // AttachmentBrokerUnprivileged and sets it as the global attachment broker.
-  // This method is thread safe.
-  static void CreateBrokerIfNeeded();
-
-  // AttachmentBroker:
-  void RegisterBrokerCommunicationChannel(Endpoint* endpoint) override;
-  void DeregisterBrokerCommunicationChannel(Endpoint* endpoint) override;
-  bool IsPrivilegedBroker() override;
-
- protected:
-  IPC::Sender* get_sender() { return sender_; }
-
-  // Errors that can be reported by subclasses.
-  // These match tools/metrics/histograms/histograms.xml.
-  // This enum is append-only.
-  enum UMAError {
-    // The brokerable attachment was successfully processed.
-    SUCCESS = 0,
-    // The brokerable attachment's destination was not the process that received
-    // the attachment.
-    WRONG_DESTINATION = 1,
-    // An error occurred while trying to receive a Mach port with mach_msg().
-    ERR_RECEIVE_MACH_MESSAGE = 2,
-    ERROR_MAX
-  };
-
-  // Emits an UMA metric.
-  void LogError(UMAError error);
-
- private:
-  // |sender_| is used to send Messages to the privileged broker process.
-  // |sender_| must live at least as long as this instance.
-  IPC::Sender* sender_;
-  DISALLOW_COPY_AND_ASSIGN(AttachmentBrokerUnprivileged);
-};
-
-}  // namespace IPC
-
-#endif  // IPC_ATTACHMENT_BROKER_UNPRIVILEGED_H_