text: // 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_BROWSER_UI_WEBUI_VERSION_HANDLER_H_
  #define CHROME_BROWSER_UI_WEBUI_VERSION_HANDLER_H_
  
  #include <vector>
  
  #include "base/memory/weak_ptr.h"
  #include "base/values.h"
  #include "content/public/browser/web_ui_message_handler.h"
  #include "content/public/common/webplugininfo.h"
  
  // Handler class for Version page operations.
  class VersionHandler : public content::WebUIMessageHandler {
   public:
    VersionHandler();
    ~VersionHandler() override;
  
    // content::WebUIMessageHandler implementation.
    void RegisterMessages() override;
  
    // Callback for the "requestVersionInfo" message. This asynchronously requests
    // the flash version and eventually returns it to the front end along with the
    // list of variations using OnGotPlugins.
    virtual void HandleRequestVersionInfo(const base::ListValue* args);
  
   private:
    // Callback which handles returning the executable and profile paths to the
    // front end.
    void OnGotFilePaths(base::string16* executable_path_data,
                        base::string16* profile_path_data);
  
    // Callback for GetPlugins which responds to the page with the Flash version.
    // This also initiates the OS Version load on ChromeOS.
    void OnGotPlugins(const std::vector<content::WebPluginInfo>& plugins);
  
    // Factory for the creating refs in callbacks.
    base::WeakPtrFactory<VersionHandler> weak_ptr_factory_;
  
    DISALLOW_COPY_AND_ASSIGN(VersionHandler);
  };
  
  #endif  // CHROME_BROWSER_UI_WEBUI_VERSION_HANDLER_H_
  