Convert ppapi/shared to use TrackedCallback.

ppapi/shared_impl/private/tcp_socket_private_impl.h

Index: ppapi/shared_impl/private/tcp_socket_private_impl.h
diff --git a/ppapi/shared_impl/private/tcp_socket_private_impl.h b/ppapi/shared_impl/private/tcp_socket_private_impl.h
index 095f1550c352f4b0c36bcfd383e7b2a394c63860..771725a8784290464dfbc02116da92b8f0d16a9c 100644
--- a/ppapi/shared_impl/private/tcp_socket_private_impl.h
+++ b/ppapi/shared_impl/private/tcp_socket_private_impl.h
@@ -9,6 +9,7 @@
 
 #include "base/compiler_specific.h"
 #include "ppapi/shared_impl/resource.h"
+#include "ppapi/shared_impl/tracked_callback.h"
 #include "ppapi/thunk/ppb_tcp_socket_private_api.h"
 
 namespace ppapi {
@@ -92,15 +93,15 @@ class PPAPI_SHARED_EXPORT TCPSocketPrivateImpl
 
   void Init(uint32 socket_id);
   bool IsConnected() const;
-  void PostAbortAndClearIfNecessary(PP_CompletionCallback* callback);
+  void PostAbortAndClearIfNecessary(scoped_refptr<TrackedCallback>* callback);
 
   uint32 socket_id_;
   ConnectionState connection_state_;
 
-  PP_CompletionCallback connect_callback_;
-  PP_CompletionCallback ssl_handshake_callback_;
-  PP_CompletionCallback read_callback_;
-  PP_CompletionCallback write_callback_;
+  scoped_refptr<TrackedCallback> connect_callback_;
+  scoped_refptr<TrackedCallback> ssl_handshake_callback_;
+  scoped_refptr<TrackedCallback> read_callback_;
+  scoped_refptr<TrackedCallback> write_callback_;
 
   char* read_buffer_;
   int32_t bytes_to_read_;