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diff --git a/dom/indexedDB/SerializationHelpers.h b/dom/indexedDB/SerializationHelpers.h
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+++ b/dom/indexedDB/SerializationHelpers.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_indexeddb_serializationhelpers_h__
+#define mozilla_dom_indexeddb_serializationhelpers_h__
+
+#include "ipc/IPCMessageUtils.h"
+
+#include "mozilla/dom/indexedDB/Key.h"
+#include "mozilla/dom/indexedDB/KeyPath.h"
+#include "mozilla/dom/IDBCursor.h"
+#include "mozilla/dom/IDBTransaction.h"
+
+namespace IPC {
+
+template <>
+struct ParamTraits<mozilla::dom::indexedDB::StructuredCloneFile::FileType> :
+  public ContiguousEnumSerializer<
+                        mozilla::dom::indexedDB::StructuredCloneFile::FileType,
+                        mozilla::dom::indexedDB::StructuredCloneFile::eBlob,
+                        mozilla::dom::indexedDB::StructuredCloneFile::eEndGuard>
+{ };
+
+template <>
+struct ParamTraits<mozilla::dom::indexedDB::Key>
+{
+  typedef mozilla::dom::indexedDB::Key paramType;
+
+  static void Write(Message* aMsg, const paramType& aParam)
+  {
+    WriteParam(aMsg, aParam.mBuffer);
+  }
+
+  static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
+  {
+    return ReadParam(aMsg, aIter, &aResult->mBuffer);
+  }
+
+  static void Log(const paramType& aParam, std::wstring* aLog)
+  {
+    LogParam(aParam.mBuffer, aLog);
+  }
+};
+
+template <>
+struct ParamTraits<mozilla::dom::indexedDB::KeyPath::KeyPathType> :
+  public ContiguousEnumSerializer<mozilla::dom::indexedDB::KeyPath::KeyPathType,
+                                  mozilla::dom::indexedDB::KeyPath::NONEXISTENT,
+                                  mozilla::dom::indexedDB::KeyPath::ENDGUARD>
+{ };
+
+template <>
+struct ParamTraits<mozilla::dom::indexedDB::KeyPath>
+{
+  typedef mozilla::dom::indexedDB::KeyPath paramType;
+
+  static void Write(Message* aMsg, const paramType& aParam)
+  {
+    WriteParam(aMsg, aParam.mType);
+    WriteParam(aMsg, aParam.mStrings);
+  }
+
+  static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
+  {
+    return ReadParam(aMsg, aIter, &aResult->mType) &&
+           ReadParam(aMsg, aIter, &aResult->mStrings);
+  }
+
+  static void Log(const paramType& aParam, std::wstring* aLog)
+  {
+    LogParam(aParam.mStrings, aLog);
+  }
+};
+
+template <>
+struct ParamTraits<mozilla::dom::IDBCursor::Direction> :
+  public ContiguousEnumSerializer<
+                          mozilla::dom::IDBCursor::Direction,
+                          mozilla::dom::IDBCursor::NEXT,
+                          mozilla::dom::IDBCursor::DIRECTION_INVALID>
+{ };
+
+template <>
+struct ParamTraits<mozilla::dom::IDBTransaction::Mode> :
+  public ContiguousEnumSerializer<
+                          mozilla::dom::IDBTransaction::Mode,
+                          mozilla::dom::IDBTransaction::READ_ONLY,
+                          mozilla::dom::IDBTransaction::MODE_INVALID>
+{ };
+
+} // namespace IPC
+
+#endif // mozilla_dom_indexeddb_serializationhelpers_h__