[mojo-edk] Duplicate process handle and take ownership in NodeChannel.

mojo/edk/system/node_channel.h

 // Copyright 2016 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 MOJO_EDK_SYSTEM_NODE_CHANNEL_H_
 #define MOJO_EDK_SYSTEM_NODE_CHANNEL_H_
 
 #include <queue>
 #include <unordered_map>
 #include <utility>
@@ skipping 91 matching lines @@
 
   // Permanently stop the channel from sending or receiving messages.
   void ShutDown();
 
   // Leaks the pipe handle instead of closing it on shutdown.
   void LeakHandleOnShutdown();
 
   // Invokes the bad message callback for this channel, if any.
   void NotifyBadMessage(const std::string& error);
 
+  // Note: On Windows, we take ownership of the remote process handle.
   void SetRemoteProcessHandle(base::ProcessHandle process_handle);
   bool HasRemoteProcessHandle();
   // Note: The returned |ProcessHandle| is owned by the caller and should be
   // freed if necessary.
   base::ProcessHandle CopyRemoteProcessHandle();
 
   // Used for context in Delegate calls (via |from_node| arguments.)
   void SetRemoteNodeName(const ports::NodeName& name);
 
   void AcceptChild(const ports::NodeName& parent_name,
@@ skipping 62 matching lines @@
   const ProcessErrorCallback process_error_callback_;
 
   base::Lock channel_lock_;
   scoped_refptr<Channel> channel_;
 
   // Must only be accessed from |io_task_runner_|'s thread.
   ports::NodeName remote_node_name_;
 
   base::Lock remote_process_handle_lock_;
   base::ProcessHandle remote_process_handle_ = base::kNullProcessHandle;
+#if defined(OS_WIN)
+  ScopedPlatformHandle scoped_remote_process_handle_;
+#endif
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
   base::Lock pending_mach_messages_lock_;
   PendingMessageQueue pending_write_messages_;
   PendingRelayMessageQueue pending_relay_messages_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(NodeChannel);
 };
 
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_NODE_CHANNEL_H_