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

chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.h

Index: chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.h
diff --git a/chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.h b/chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.h
new file mode 100644
index 0000000000000000000000000000000000000000..6f0cb88088fd0836a1e2a82a76dd9bebf90aad6a
--- /dev/null
+++ b/chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.h
@@ -0,0 +1,27 @@
+// 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_RENDERER_CONTEXT_MENU_CONTEXT_MENU_CONTENT_TYPE_PLATFORM_APP_H_
+#define CHROME_BROWSER_RENDERER_CONTEXT_MENU_CONTEXT_MENU_CONTENT_TYPE_PLATFORM_APP_H_
+
+#include "chrome/browser/renderer_context_menu/context_menu_content_type.h"
+
+class ContextMenuContentTypePlatformApp : public ContextMenuContentType {
+ public:
+  virtual ~ContextMenuContentTypePlatformApp();
+
+  // ContextMenuContentType overrides.
+  virtual bool SupportsGroup(int group) OVERRIDE;
+
+ protected:
+  ContextMenuContentTypePlatformApp(content::RenderFrameHost* render_frame_host,
+                                    const content::ContextMenuParams& params);
+
+ private:
+  friend class ContextMenuContentTypeFactory;
+
+  DISALLOW_COPY_AND_ASSIGN(ContextMenuContentTypePlatformApp);
+};
+
+#endif  // CHROME_BROWSER_RENDERER_CONTEXT_MENU_CONTEXT_MENU_CONTENT_TYPE_PLATFORM_APP_H_