Added classes to enable session sync functionality.

chrome/browser/dom_ui/value_helper.cc

Index: chrome/browser/dom_ui/value_helper.cc
diff --git a/chrome/browser/dom_ui/value_helper.cc b/chrome/browser/dom_ui/value_helper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6513f24f35a5b73b1dfe64dcbcbc53fc9423da05
--- /dev/null
+++ b/chrome/browser/dom_ui/value_helper.cc
@@ -0,0 +1,47 @@
+// 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.
+
+#include "chrome/browser/dom_ui/value_helper.h"
+
+#include "chrome/browser/dom_ui/new_tab_ui.h"
+#include "chrome/common/url_constants.h"
+
+bool ValueHelper::TabToValue(
+    const TabRestoreService::Tab& tab,
+    DictionaryValue* dictionary) {
+  if (tab.navigations.empty())
+    return false;
+
+  const TabNavigation& current_navigation =
+      tab.navigations.at(tab.current_navigation_index);
+  if (current_navigation.virtual_url() == GURL(chrome::kChromeUINewTabURL))
+    return false;
+  NewTabUI::SetURLTitleAndDirection(dictionary, current_navigation.title(),
+                                    current_navigation.virtual_url());
+  dictionary->SetString(L"type", L"tab");
+  dictionary->SetReal(L"timestamp", tab.timestamp.ToDoubleT());
+  return true;
+}
+
+bool ValueHelper::WindowToValue(
+    const TabRestoreService::Window& window,
+    DictionaryValue* dictionary) {
+  if (window.tabs.empty()) {
+    NOTREACHED();
+    return false;
+  }
+  scoped_ptr<ListValue> tab_values(new ListValue());
+  for (size_t i = 0; i < window.tabs.size(); ++i) {
+    scoped_ptr<DictionaryValue> tab_value(new DictionaryValue());
+    if (TabToValue(window.tabs[i], tab_value.get()))
+      tab_values->Append(tab_value.release());
+  }
+  if (tab_values->GetSize() == 0)
+    return false;
+  dictionary->SetString(L"type", L"window");
+  dictionary->SetReal(L"timestamp", window.timestamp.ToDoubleT());
+  dictionary->Set(L"tabs", tab_values.release());
+  return true;
+}
+