PPAPI: Make blocking completion callbacks work.

ppapi/shared_impl/private/udp_socket_private_impl.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_UDP_SOCKET_PRIVATE_IMPL_H_
 #define PPAPI_SHARED_IMPL_PRIVATE_UDP_SOCKET_PRIVATE_IMPL_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 23 matching lines @@
   static const int32_t kMaxReadSize;
   // The maximum number of bytes that each PpapiHostMsg_PPBUDPSocket_SendTo
   // message is allowed to carry.
   static const int32_t kMaxWriteSize;
 
   // Resource overrides.
   virtual PPB_UDPSocket_Private_API* AsPPB_UDPSocket_Private_API() OVERRIDE;
 
   // PPB_UDPSocket_Private_API implementation.
   virtual int32_t Bind(const PP_NetAddress_Private* addr,
-                       PP_CompletionCallback callback) OVERRIDE;
+                       scoped_refptr<TrackedCallback> callback) OVERRIDE;
   virtual PP_Bool GetBoundAddress(PP_NetAddress_Private* addr) OVERRIDE;
   virtual int32_t RecvFrom(char* buffer,
                            int32_t num_bytes,
-                           PP_CompletionCallback callback) OVERRIDE;
+                           scoped_refptr<TrackedCallback> callback) OVERRIDE;
   virtual PP_Bool GetRecvFromAddress(PP_NetAddress_Private* addr) OVERRIDE;
   virtual int32_t SendTo(const char* buffer,
                          int32_t num_bytes,
                          const PP_NetAddress_Private* addr,
-                         PP_CompletionCallback callback) OVERRIDE;
+                         scoped_refptr<TrackedCallback> callback) OVERRIDE;
   virtual void Close() OVERRIDE;
 
   // Notifications from the proxy.
   void OnBindCompleted(bool succeeded,
                        const PP_NetAddress_Private& bound_addr);
   void OnRecvFromCompleted(bool succeeded,
                            const std::string& data,
                            const PP_NetAddress_Private& addr);
   void OnSendToCompleted(bool succeeded, int32_t bytes_written);
 
@@ skipping 23 matching lines @@
 
   PP_NetAddress_Private recvfrom_addr_;
   PP_NetAddress_Private bound_addr_;
 
   DISALLOW_COPY_AND_ASSIGN(UDPSocketPrivateImpl);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PRIVATE_UDP_SOCKET_PRIVATE_IMPL_H_