Fix memory leak in IPC::ChannelProxy

ipc/ipc_channel_proxy.h

 // Copyright (c) 2006-2008 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/ref_counted.h"
 #include "ipc/ipc_channel.h"
 
 class MessageLoop;
 
 namespace IPC {
 
+class SendTask;
+
 //-----------------------------------------------------------------------------
 // IPC::ChannelProxy
 //
 // This class is a helper class that is useful when you wish to run an IPC
 // channel on a background thread.  It provides you with the option of either
 // handling IPC messages on that background thread or having them dispatched to
 // your main thread (the thread on which the IPC::ChannelProxy is created).
 //
 // The API for an IPC::ChannelProxy is very similar to that of an IPC::Channel.
 // When you send a message to an IPC::ChannelProxy, the message is routed to
@@ skipping 140 matching lines @@
     virtual void OnChannelOpened();
     virtual void OnChannelClosed();
 
     // Called on the consumers thread when the ChannelProxy is closed.  At that
     // point the consumer is telling us that they don't want to receive any
     // more messages, so we honor that wish by forgetting them!
     virtual void Clear() { listener_ = NULL; }
 
    private:
     friend class ChannelProxy;
+    friend class SendTask;
     // Create the Channel
     void CreateChannel(const std::string& id, const Channel::Mode& mode);
 
     // Methods called via InvokeLater:
     void OnSendMessage(Message* message_ptr);
     void OnAddFilter(MessageFilter* filter);
     void OnRemoveFilter(MessageFilter* filter);
     void OnDispatchConnected();
     void OnDispatchError();
 
     MessageLoop* listener_message_loop_;
     Channel::Listener* listener_;
 
     // List of filters.  This is only accessed on the IPC thread.
     std::vector<scoped_refptr<MessageFilter> > filters_;
     MessageLoop* ipc_message_loop_;
     Channel* channel_;
     std::string channel_id_;
     int peer_pid_;
     bool channel_connected_called_;
   };
 
   Context* context() { return context_; }
 
  private:
+  friend class SendTask;
+
   void Init(const std::string& channel_id, Channel::Mode mode,
             MessageLoop* ipc_thread_loop, bool create_pipe_now);
 
   // 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_;
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_PROXY_H__