PPAPI: Make blocking completion callbacks work.

ppapi/shared_impl/private/ppb_tcp_server_socket_shared.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 PPAPI_SHARED_IMPL_PRIVATE_PPB_TCP_SERVER_SOCKET_SHARED_H_
 #define PPAPI_SHARED_IMPL_PRIVATE_PPB_TCP_SERVER_SOCKET_SHARED_H_
 
 #include "base/compiler_specific.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/shared_impl/resource.h"
@@ skipping 17 matching lines @@
 
   virtual ~PPB_TCPServerSocket_Shared();
 
   // Resource overrides.
   virtual PPB_TCPServerSocket_Private_API*
       AsPPB_TCPServerSocket_Private_API() OVERRIDE;
 
   // PPB_TCPServerSocket_Private_API implementation.
   virtual int32_t Listen(const PP_NetAddress_Private* addr,
                          int32_t backlog,
-                         PP_CompletionCallback callback) OVERRIDE;
+                         scoped_refptr<TrackedCallback> callback) OVERRIDE;
   virtual int32_t Accept(PP_Resource* tcp_socket,
-                         PP_CompletionCallback callback) OVERRIDE;
+                         scoped_refptr<TrackedCallback> callback) OVERRIDE;
   virtual void StopListening() OVERRIDE;
 
   void OnListenCompleted(uint32 socket_id, int32_t status);
   virtual void OnAcceptCompleted(bool succeeded,
                                  uint32 accepted_socket_id,
                                  const PP_NetAddress_Private& local_addr,
                                  const PP_NetAddress_Private& remote_addr) = 0;
 
   // Send functions that need to be implemented differently for the
   // proxied and non-proxied derived classes.
@@ skipping 20 matching lines @@
   scoped_refptr<TrackedCallback> accept_callback_;
 
   PP_Resource* tcp_socket_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_TCPServerSocket_Shared);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PRIVATE_PPB_TCP_SERVER_SOCKET_SHARED_H_