Translate: do not show the context menu entry when the feature is disabled

components/translate/core/browser/translate_prefs.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_PREFS_H_
 #define COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_PREFS_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 76 matching lines @@
   static const char kPrefTranslateBlockedLanguages[];
   static const char kPrefTranslateLastDeniedTimeForLanguage[];
   static const char kPrefTranslateTooOftenDeniedForLanguage[];
 
   // |preferred_languages_pref| is only used on Chrome OS, other platforms must
   // pass NULL.
   TranslatePrefs(PrefService* user_prefs,
                  const char* accept_languages_pref,
                  const char* preferred_languages_pref);
 
+  // Checks if the translate feature is enabled.
+  bool IsEnabled() const;
+
   // Sets the country that the application is run in. Determined by the
   // VariationsService, can be left empty. Used by TranslateExperiment.
   void SetCountry(const std::string& country);
   std::string GetCountry() const;
 
   // Resets the blocked languages list, the sites blacklist, the languages
   // whitelist, and the accepted/denied counts.
   void ResetToDefaults();
 
   bool IsBlockedLanguage(const std::string& original_language) const;
@@ skipping 113 matching lines @@
   PrefService* prefs_;  // Weak.
 
   std::string country_;  // The country the app runs in.
 
   DISALLOW_COPY_AND_ASSIGN(TranslatePrefs);
 };
 
 }  // namespace translate
 
 #endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_PREFS_H_