base::Bind: Convert Socket::Write.

net/socket/socket.h

Index: net/socket/socket.h
diff --git a/net/socket/socket.h b/net/socket/socket.h
index c185c44aa30ef9689157769f7e57f25ad634ab30..b02de0ad8405031829d2ba90c3fc9b7041c06f29 100644
--- a/net/socket/socket.h
+++ b/net/socket/socket.h
@@ -48,6 +48,8 @@ class NET_EXPORT Socket {
   // Disconnected before the write completes, the callback will not be invoked.
   virtual int Write(IOBuffer* buf, int buf_len,
                     OldCompletionCallback* callback) = 0;
+  virtual int Write(IOBuffer* buf, int buf_len,
+                    const CompletionCallback& callback) = 0;
 
   // Set the receive buffer size (in bytes) for the socket.
   // Note: changing this value can affect the TCP window size on some platforms.