Added classes to enable session sync functionality.

chrome/browser/dom_ui/foreign_session_handler.h

Index: chrome/browser/dom_ui/foreign_session_handler.h
diff --git a/chrome/browser/dom_ui/foreign_session_handler.h b/chrome/browser/dom_ui/foreign_session_handler.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 CHROME_BROWSER_DOM_UI_FOREIGN_SESSION_HANDLER_H_
+#define CHROME_BROWSER_DOM_UI_FOREIGN_SESSION_HANDLER_H_
+#pragma once
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "chrome/browser/dom_ui/dom_ui.h"
+#include "chrome/browser/sessions/session_service.h"
+#include "chrome/browser/sync/glue/session_model_associator.h"
+#include "chrome/common/notification_observer.h"
+#include "chrome/common/notification_registrar.h"
+
+namespace browser_sync {
+
+class ForeignSessionHandler : public DOMMessageHandler,
+                              public NotificationObserver {
+ public:
+  // DOMMessageHandler implementation.
+  virtual void RegisterMessages();
+
+  ForeignSessionHandler();
+  virtual ~ForeignSessionHandler() {}
+
+ private:
+  // Used to register ForeignSessionHandler for notifications.
+  void Init();
+
+  // Determines how ForeignSessionHandler will interact with the new tab page.
+  void Observe(NotificationType type, const NotificationSource& source,
+               const NotificationDetails& details);
+
+  // Returns a pointer to the current session model associator or NULL.
+  SessionModelAssociator* GetModelAssociator();
+
+  // Determines whether foreign sessions should be obtained from the sync model.
+  // This is a javascript callback handler, and it is also called when the sync
+  // model has changed and the new tab page needs to reflect the changes.
+  void HandleGetForeignSessions(const Value* content);
+
+  // Helper for reopening a foreign session in a new browser window.
+  void OpenForeignSession(SessionModelAssociator* associator, int64 id);
+
+  // Helper for listing the foreign sessions on the new tab page.
+  void GetForeignSessions(SessionModelAssociator* associator);
+
+  // Determines which session is to be opened, and then calls
+  // OpenForeignSession, to begin the process of opening a new browser window.
+  // This is a javascript callback handler.
+  void HandleReopenForeignSession(const Value* content);
+
+  // The Registrar used to register ForeignSessionHandler for notifications.
+  NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(ForeignSessionHandler);
+};
+
+}  // namespace browser_sync
+
+#endif  // CHROME_BROWSER_DOM_UI_FOREIGN_SESSION_HANDLER_H_
+