diff -r 000000000000 -r 6474c204b198 ipc/chromium/src/chrome/common/ipc_channel_win.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/chromium/src/chrome/common/ipc_channel_win.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,117 @@
+// 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_WIN_H_
+#define CHROME_COMMON_IPC_CHANNEL_WIN_H_
+
+#include "chrome/common/ipc_channel.h"
+
+#include <queue>
+#include <string>
+
+#include "base/message_loop.h"
+
+class NonThreadSafe;
+
+namespace IPC {
+
+class Channel::ChannelImpl : public MessageLoopForIO::IOHandler {
+ public:
+  // Mirror methods of Channel, see ipc_channel.h for description.
+  ChannelImpl(const std::wstring& channel_id, Mode mode, Listener* listener);
+  ChannelImpl(const std::wstring& channel_id, HANDLE server_pipe,
+              Mode mode, Listener* listener);
+  ~ChannelImpl() { 
+    if (pipe_ != INVALID_HANDLE_VALUE) {
+      Close();
+    }
+  }
+  bool Connect();
+  void Close();
+  HANDLE GetServerPipeHandle() const;
+  Listener* set_listener(Listener* listener) {
+    Listener* old = listener_;
+    listener_ = listener;
+    return old;
+  }
+  bool Send(Message* message);
+
+  // See the comment in ipc_channel.h for info on Unsound_IsClosed() and
+  // Unsound_NumQueuedMessages().
+  bool Unsound_IsClosed() const;
+  uint32_t Unsound_NumQueuedMessages() const;
+
+ private:
+  void Init(Mode mode, Listener* listener);
+
+  void OutputQueuePush(Message* msg);
+  void OutputQueuePop();
+
+  const std::wstring PipeName(const std::wstring& channel_id) const;
+  bool CreatePipe(const std::wstring& channel_id, Mode mode);
+  bool EnqueueHelloMessage();
+
+  bool ProcessConnection();
+  bool ProcessIncomingMessages(MessageLoopForIO::IOContext* context,
+                               DWORD bytes_read);
+  bool ProcessOutgoingMessages(MessageLoopForIO::IOContext* context,
+                               DWORD bytes_written);
+
+  // MessageLoop::IOHandler implementation.
+  virtual void OnIOCompleted(MessageLoopForIO::IOContext* context,
+                             DWORD bytes_transfered, DWORD error);
+ private:
+  struct State {
+    explicit State(ChannelImpl* channel);
+    ~State();
+    MessageLoopForIO::IOContext context;
+    bool is_pending;
+  };
+
+  State input_state_;
+  State output_state_;
+
+  HANDLE pipe_;
+
+  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_;
+
+  // This flag is set after Close() is run on the channel.
+  bool closed_;
+
+  // This variable is updated so it matches output_queue_.size(), except we can
+  // read output_queue_length_ from any thread (if we're OK getting an
+  // occasional out-of-date or bogus value).  We use output_queue_length_ to
+  // implement Unsound_NumQueuedMessages.
+  size_t output_queue_length_;
+
+  ScopedRunnableMethodFactory<ChannelImpl> factory_;
+
+  scoped_ptr<NonThreadSafe> thread_check_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChannelImpl);
+};
+
+}  // namespace IPC
+
+#endif  // CHROME_COMMON_IPC_CHANNEL_WIN_H_