Separate out logic to handle different category/group of context menu items from RVContextMenu class

chrome/browser/tab_contents/menu_category_factory.h

+// Copyright 2014 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_TAB_CONTENTS_MENU_CATEGORY_FACTORY_H_
+#define CHROME_BROWSER_TAB_CONTENTS_MENU_CATEGORY_FACTORY_H_
+
+#include "content/public/common/context_menu_params.h"
+
+class MenuCategoryBase;
+
+namespace content {
+class RenderFrameHost;
+class WebContents;
+}
+
+class MenuCategoryFactory {
+ public:
+  static MenuCategoryBase* Create(
+      content::WebContents* web_contents,
+      content::RenderFrameHost* render_frame_host,
+      const content::ContextMenuParams& params);
+
+ private:
+  MenuCategoryFactory();
+  virtual ~MenuCategoryFactory();
+
+  DISALLOW_COPY_AND_ASSIGN(MenuCategoryFactory);
+};
+
+#endif  // CHROME_BROWSER_TAB_CONTENTS_MENU_CATEGORY_FACTORY_H_