IPC::ChannelMojo: Introduce IPC::MojoBootstrap for Windows

ipc/mojo/ipc_channel_mojo_host.h

+// 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.
+
+#ifndef IPC_IPC_CHANNEL_MOJO_HOST_H_
+#define IPC_IPC_CHANNEL_MOJO_HOST_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "base/process/process_handle.h"
+#include "ipc/ipc_export.h"
+
+namespace base {
+class TaskRunner;
+}
+
+namespace IPC {
+
+class ChannelMojo;
+
+// Through ChannelMojoHost, ChannelMojo gets extra information that
+// its client provides, including the child process's process handle. Every
+// server process that uses ChannelMojo must have a ChannelMojoHost
+// instance and call OnClientLaunched().
+class IPC_MOJO_EXPORT ChannelMojoHost {
+ public:
+  explicit ChannelMojoHost(scoped_refptr<base::TaskRunner> task_runner);
+  ~ChannelMojoHost();
+
+  void OnClientLaunched(base::ProcessHandle process);
+
+ private:
+  friend class ChannelMojo;
+
+  void OnChannelCreated(ChannelMojo* channel);
+  void OnChannelDestroyed();
+
+  void InvokeOnClientLaunched(base::ProcessHandle process);
+
+  base::WeakPtrFactory<ChannelMojoHost> weak_factory_;
+  scoped_refptr<base::TaskRunner> task_runner_;
+  ChannelMojo* channel_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChannelMojoHost);
+};
+
+}  // namespace IPC
+
+#endif  // IPC_IPC_CHANNEL_MOJO_HOST_H_