Add ChannelPosix::ResetSafely() to deal with a lingering crash

ipc/ipc_channel_posix.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 IPC_IPC_CHANNEL_POSIX_H_
 #define IPC_IPC_CHANNEL_POSIX_H_
 
 #include "ipc/ipc_channel.h"
 
 #include <sys/socket.h>  // for CMSG macros
@@ skipping 184 matching lines @@
   char input_cmsg_buf_[kMaxReadFDBuffer];
 
   // File descriptors extracted from messages coming off of the channel. The
   // handles may span messages and come off different channels from the message
   // data (in the case of READWRITE), and are processed in FIFO here.
   // NOTE: The implementation assumes underlying storage here is contiguous, so
   // don't change to something like std::deque<> without changing the
   // implementation!
   std::vector<int> input_fds_;
 
+
+  void ResetSafely(base::ScopedFD* fd);
+  bool in_dtor_;
+
 #if defined(OS_MACOSX)
   // On OSX, sent FDs must not be closed until we get an ack.
   // Keep track of sent FDs here to make sure the remote is not
   // trying to bamboozle us.
   std::set<int> fds_to_close_;
 #endif
 
   // True if we are responsible for unlinking the unix domain socket file.
   bool must_unlink_;
 
 #if defined(OS_LINUX)
   // If non-zero, overrides the process ID sent in the hello message.
   static int global_pid_;
 #endif  // OS_LINUX
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ChannelPosix);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_POSIX_H_