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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_UI_WEBUI_VERSION_HANDLER_CHROMEOS_H_
      6 #define CHROME_BROWSER_UI_WEBUI_VERSION_HANDLER_CHROMEOS_H_
      7 
      8 #include <string>
      9 
     10 #include "chrome/browser/chromeos/version_loader.h"
     11 #include "chrome/browser/ui/webui/version_handler.h"
     12 
     13 // VersionHandlerChromeOS is responsible for loading the Chrome OS
     14 // version.
     15 class VersionHandlerChromeOS : public VersionHandler {
     16  public:
     17   VersionHandlerChromeOS();
     18   virtual ~VersionHandlerChromeOS();
     19 
     20   // VersionHandler overrides:
     21   virtual void HandleRequestVersionInfo(const base::ListValue* args) OVERRIDE;
     22 
     23   // Callback from chromeos::VersionLoader giving the version.
     24   void OnVersion(const std::string& version);
     25 
     26  private:
     27   // Handles asynchronously loading the version.
     28   chromeos::VersionLoader loader_;
     29 
     30   // Used to request the version.
     31   base::CancelableTaskTracker tracker_;
     32 
     33   DISALLOW_COPY_AND_ASSIGN(VersionHandlerChromeOS);
     34 };
     35 
     36 #endif  // CHROME_BROWSER_UI_WEBUI_VERSION_HANDLER_CHROMEOS_H_
     37