Switch to standard integer types in extensions/.

extensions/renderer/object_backed_native_handler.cc

 // Copyright 2014 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 "extensions/renderer/object_backed_native_handler.h"
 
+#include <stddef.h>
+
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
 #include "extensions/renderer/console.h"
 #include "extensions/renderer/module_system.h"
 #include "extensions/renderer/script_context.h"
 #include "extensions/renderer/script_context_set.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
@@ skipping 129 matching lines @@
                                               v8::Local<v8::Object> obj,
                                               const char* key) {
   obj->DeletePrivate(context,
                      v8::Private::ForApi(
                          context->GetIsolate(),
                          v8::String::NewFromUtf8(context->GetIsolate(), key)))
       .FromJust();
 }
 
 }  // namespace extensions