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diff --git a/content/common/indexed_db_param_traits.h b/content/common/indexed_db_param_traits.h
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+++ b/content/common/indexed_db_param_traits.h
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+// Copyright (c) 2010 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.
+
+#ifndef CONTENT_COMMON_INDEXED_DB_PARAM_TRAITS_H_
+#define CONTENT_COMMON_INDEXED_DB_PARAM_TRAITS_H_
+#pragma once
+
+#include "ipc/ipc_message.h"
+#include "ipc/ipc_param_traits.h"
+
+class IndexedDBKey;
+class SerializedScriptValue;
+
+namespace IPC {
+
+// These datatypes are used by utility_messages.h and render_messages.h.
+// Unfortunately we can't move it to common: MSVC linker complains about
+// WebKit datatypes that are not linked on npchrome_frame (even though it's
+// never actually used by that target).
+
+template <>
+struct ParamTraits<SerializedScriptValue> {
+  typedef SerializedScriptValue param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<IndexedDBKey> {
+  typedef IndexedDBKey param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+} // namespace IPC
+
+#endif  // CONTENT_COMMON_INDEXED_DB_PARAM_TRAITS_H_