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diff --git a/src_mobile/Plugin/AppBoxPlugin/AppBoxObserver.h b/src_mobile/Plugin/AppBoxPlugin/AppBoxObserver.h
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+++ b/src_mobile/Plugin/AppBoxPlugin/AppBoxObserver.h
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+/*
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd All Rights Reserved
+ *
+ *    Licensed under the Flora License, Version 1.1 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *        http://floralicense.org/license/
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+/**
+ * @file    AppBoxObserver.h
+ * @author  Yunchan Cho (yunchan.cho@samsung.com)
+ */
+#ifndef APP_BOX_OBSERVER_H
+#define APP_BOX_OBSERVER_H
+
+#include <string>
+#include <map>
+#include <memory>
+
+class AppBoxRenderView;
+class AppBoxRenderBuffer;
+
+class AppBoxObserver {
+    public:
+        static AppBoxObserver* Instance();
+        void initialize();
+        void shutdown();
+        void registerRenderView(std::string instanceId, AppBoxRenderView* view);
+        void unregisterRenderView(std::string instanceId);
+        void registerRenderBuffer(std::string instanceId, AppBoxRenderBuffer* view);
+        void unregisterRenderBuffer(std::string instanceId);
+        AppBoxRenderView* getRenderView(std::string instanceId);
+        AppBoxRenderBuffer* getRenderBuffer(std::string instanceId);
+        std::shared_ptr<Ewk_Context> getPdEwkContext();
+
+    private:
+        AppBoxObserver();
+        ~AppBoxObserver();
+
+        typedef std::map<std::string, AppBoxRenderView*> RenderViewMap;
+        typedef std::pair<std::string, AppBoxRenderView*> RenderViewMapPair;
+        typedef std::map<std::string, AppBoxRenderBuffer*> RenderBufferMap;
+        typedef std::pair<std::string, AppBoxRenderBuffer*> RenderBufferMapPair;
+
+        bool m_initialized;
+        RenderViewMap m_renderViewMap;
+        RenderBufferMap m_renderBufferMap;
+        std::shared_ptr<Ewk_Context> m_pdEwkContext;
+        static AppBoxObserver* s_instance;
+};
+
+#endif //APP_BOX_OBSERVER_H