Switch to standard integer types in ppapi/.

ppapi/tests/test_file_ref.cc

 // Copyright (c) 2011 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.
 
 #include "ppapi/tests/test_file_ref.h"
 
+#include <stddef.h>
 #include <stdio.h>
 
 #include <sstream>
 #include <vector>
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_file_io.h"
 #include "ppapi/c/private/ppb_testing_private.h"
 #include "ppapi/cpp/directory_entry.h"
 #include "ppapi/cpp/file_io.h"
@@ skipping 749 matching lines @@
   {
     rv = pp::FileRef(file_system, test_dir_name)
         .ReadDirectoryEntries(output_callback.GetCallback());
   }
   output_callback.WaitForAbortResult(rv);
   CHECK_CALLBACK_BEHAVIOR(output_callback);
 
 
   PASS();
 }