Introduce content::PageState

content/public/renderer/history_item_serialization.cc

+// Copyright (c) 2013 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 "content/public/renderer/history_item_serialization.h"
+
+#include "content/public/common/page_state.h"
+#include "webkit/glue/glue_serialize_deprecated.h"
+
+namespace content {
+
+PageState HistoryItemToPageState(const WebKit::WebHistoryItem& item) {
+  return PageState::CreateFromEncodedData(
+      webkit_glue::HistoryItemToString(item));
+}
+
+WebKit::WebHistoryItem PageStateToHistoryItem(const PageState& state) {
+  return webkit_glue::HistoryItemFromString(state.ToEncodedData());
+}
+
+}  // namespace content