[Extensions] Update installed bubble for extensions with synthesized actions

chrome/common/extensions/api/extension_action/action_info.h

 // Copyright (c) 2012 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_COMMON_EXTENSIONS_API_EXTENSION_ACTION_ACTION_INFO_H_
 #define CHROME_COMMON_EXTENSIONS_API_EXTENSION_ACTION_ACTION_INFO_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
@@ skipping 48 matching lines @@
   // Returns true if the extension needs a verbose install message because
   // of its page action.
   static bool IsVerboseInstallMessage(const Extension* extension);
 
   // Empty implies the key wasn't present.
   ExtensionIconSet default_icon;
   std::string default_title;
   GURL default_popup_url;
   // action id -- only used with legacy page actions API.
   std::string id;
+  // Whether or not this action was synthesized to force visibility.
+  bool synthesized;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_API_EXTENSION_ACTION_ACTION_INFO_H_