Disconnect native messaging port on read pipe EOF.

chrome/browser/extensions/api/messaging/native_message_process_host.h

 // Copyright (c) 2012 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_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_MESSAGE_PROCESS_HOST_H_
 #define CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_MESSAGE_PROCESS_HOST_H_
 
 #include <queue>
 #include <string>
 
@@ skipping 130 matching lines @@
 
   // Write stream.
   scoped_ptr<net::FileStream> write_stream_;
 
   // Read buffer passed to FileStream::Read().
   scoped_refptr<net::IOBuffer> read_buffer_;
 
   // Set to true when a read is pending.
   bool read_pending_;
 
-  // Set to true once we've read EOF from the child process.
-  bool read_eof_;
-
   // Buffer for incomplete incoming messages.
   std::string incoming_data_;
 
   // Queue for outgoing messages.
   std::queue<scoped_refptr<net::IOBufferWithSize> > write_queue_;
 
   // The message that's currently being sent.
   scoped_refptr<net::DrainableIOBuffer> current_write_buffer_;
 
   // Set to true when a write is pending.
   bool write_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeMessageProcessHost);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_MESSAGE_PROCESS_HOST_H_