verifier_test: Suppress the unused parameter warnings.

    void Init() { }

    void SetStage(int, int) { }

    void SetLocale(const char*) { }

    void SetBackground(Icon icon) { }

    void SetBackground(Icon /*icon*/) { }

    void SetProgressType(ProgressType determinate) { }

    void ShowProgress(float portion, float seconds) { }

    void SetProgress(float fraction) { }

    void SetProgressType(ProgressType /*determinate*/) { }

    void ShowProgress(float /*portion*/, float /*seconds*/) { }

    void SetProgress(float /*fraction*/) { }

    void ShowText(bool visible) { }

    void ShowText(bool /*visible*/) { }

    bool IsTextVisible() { return false; }

    bool WasTextEverVisible() { return false; }

    void Print(const char* fmt, ...) {

    }

    void ShowFile(const char*) { }

    void StartMenu(const char* const * headers, const char* const * items,

                           int initial_selection) { }

    int SelectMenu(int sel) { return 0; }

    void StartMenu(const char* const* /*headers*/,

                   const char* const* /*items*/,

                   int /*initial_selection*/) { }

    int SelectMenu(int /*sel*/) { return 0; }

    void EndMenu() { }

};