Eliminate a potential race in IPC::ChannelProxy

ipc/ipc_channel_proxy.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_PROXY_H_
 #define IPC_IPC_CHANNEL_PROXY_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
@@ skipping 233 matching lines @@
 
     // Holds filters between the AddFilter call on the listerner thread and the
     // IPC thread when they're added to filters_.
     std::vector<scoped_refptr<MessageFilter> > pending_filters_;
     // Lock for pending_filters_.
     base::Lock pending_filters_lock_;
 
     // Cached copy of the peer process ID. Set on IPC but read on both IPC and
     // listener threads.
     base::ProcessId peer_pid_;
+
+    bool channel_is_connected_;
   };
 
   Context* context() { return context_.get(); }
 
  private:
   friend class SendCallbackHelper;
 
   // By maintaining this indirection (ref-counted) to our internal state, we
   // can safely be destroyed while the background thread continues to do stuff
   // that involves this data.
   scoped_refptr<Context> context_;
 
   // Whether the channel has been initialized.
   bool did_init_;
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_PROXY_H_