Implement ScopedFD in terms of ScopedGeneric.

net/test/spawned_test_server/local_test_server.h

Index: net/test/spawned_test_server/local_test_server.h
diff --git a/net/test/spawned_test_server/local_test_server.h b/net/test/spawned_test_server/local_test_server.h
index cfd2eb3baeeb308340229b6ae8b87ffda929b5a7..d916835b1a26c99a30a1891258f040c4d12d8018 100644
--- a/net/test/spawned_test_server/local_test_server.h
+++ b/net/test/spawned_test_server/local_test_server.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/process/process_handle.h"
 #include "net/test/spawned_test_server/base_test_server.h"
 
@@ -105,8 +106,7 @@ class LocalTestServer : public BaseTestServer {
 
 #if defined(OS_POSIX)
   // The file descriptor the child writes to when it starts.
-  int child_fd_;
-  file_util::ScopedFD child_fd_closer_;
+  base::ScopedFD child_fd_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(LocalTestServer);