Simplify infobar expiry.

components/translate/core/browser/translate_infobar_delegate.h

 // 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 COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_INFOBAR_DELEGATE_H_
 #define COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_INFOBAR_DELEGATE_H_
 
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 181 matching lines @@
       TranslateErrors::Type error_type,
       bool triggered_from_menu);
 
  private:
   friend class TranslationInfoBarTest;
   typedef std::pair<std::string, base::string16> LanguageNamePair;
 
   // InfoBarDelegate:
   Type GetInfoBarType() const override;
   int GetIconID() const override;
-  bool ShouldExpire(const NavigationDetails& details) const override;
   void InfoBarDismissed() override;
   TranslateInfoBarDelegate* AsTranslateInfoBarDelegate() override;
 
   bool is_off_the_record_;
   translate::TranslateStep step_;
 
   // The type of fading animation if any that should be used when showing this
   // infobar.
   BackgroundAnimationType background_animation_;
 
   TranslateUIDelegate ui_delegate_;
   base::WeakPtr<TranslateManager> translate_manager_;
 
   // The error that occurred when trying to translate (NONE if no error).
   TranslateErrors::Type error_type_;
 
   // The translation related preferences.
   scoped_ptr<TranslatePrefs> prefs_;
 
   // Whether the translation was triggered via a menu click vs automatically
   // (due to language detection, preferences...)
   bool triggered_from_menu_;
   DISALLOW_COPY_AND_ASSIGN(TranslateInfoBarDelegate);
 };
 
 }  // namespace translate
 
 #endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_INFOBAR_DELEGATE_H_