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diff --git a/chrome/common/ipc_channel_posix.h b/chrome/common/ipc_channel_posix.h
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+++ b/chrome/common/ipc_channel_posix.h
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+// Copyright (c) 2008 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 CHROME_COMMON_IPC_CHANNEL_POSIX_H_
+#define CHROME_COMMON_IPC_CHANNEL_POSIX_H_
+
+#include "chrome/common/ipc_channel.h"
+
+#include <queue>
+#include <string>
+
+#include "base/message_loop.h"
+#include "third_party/libevent/event.h"
+
+namespace IPC {
+
+class Channel::ChannelImpl : public MessageLoopForIO::FileWatcher {
+ public:
+  // Mirror methods of Channel, see ipc_channel.h for description.
+  ChannelImpl(const std::wstring& channel_id, Mode mode, Listener* listener);
+  ~ChannelImpl() { Close(); }
+  bool Connect();
+  void Close();
+  void set_listener(Listener* listener) { listener_ = listener; }
+  bool Send(Message* message);
+ private:
+  const std::wstring PipeName(const std::wstring& channel_id) const;
+  bool CreatePipe(const std::wstring& channel_id, Mode mode);
+
+  bool ProcessIncomingMessages();
+  bool ProcessOutgoingMessages();
+
+  void OnFileReadReady(int fd);
+  void OnFileWriteReady(int fd);
+
+  Mode mode_;
+
+  // Wrapper for Libevent event.
+  // TODO(playmobil): MessageLoopForIO needs to better encapsulate libevent.
+  struct EventHolder {
+  EventHolder() : is_active(false) {}
+  ~EventHolder() {}
+
+  bool is_active;
+
+  // libevent's set functions set all the needed members of this struct, so no
+  // need to initialize before use.
+  struct event event;
+  };
+
+  EventHolder *server_listen_connection_event_;
+  EventHolder *read_event_;
+  EventHolder *write_event_;
+
+  // If sending a message blocks then we use this variable
+  // to keep track of where we are.
+  size_t message_send_bytes_written_;
+
+  int server_listen_pipe_;
+  int pipe_;
+  std::string pipe_name_;
+
+  Listener* listener_;
+
+  // Messages to be sent are queued here.
+  std::queue<Message*> output_queue_;
+
+  // We read from the pipe into this buffer
+  char input_buf_[Channel::kReadBufferSize];
+
+  // Large messages that span multiple pipe buffers, get built-up using
+  // this buffer.
+  std::string input_overflow_buf_;
+
+  // In server-mode, we have to wait for the client to connect before we
+  // can begin reading.  We make use of the input_state_ when performing
+  // the connect operation in overlapped mode.
+  bool waiting_connect_;
+
+  // This flag is set when processing incoming messages.  It is used to
+  // avoid recursing through ProcessIncomingMessages, which could cause
+  // problems.  TODO(darin): make this unnecessary
+  bool processing_incoming_;
+
+  ScopedRunnableMethodFactory<ChannelImpl> factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChannelImpl);
+};
+
+}  // namespace IPC
+
+#endif  // CHROME_COMMON_IPC_CHANNEL_POSIX_H_