Extend the translate prefs interface with new methods to clear/check blacklisted sites/languages

chrome/browser/translate/translate_prefs.h

Index: chrome/browser/translate/translate_prefs.h
diff --git a/chrome/browser/translate/translate_prefs.h b/chrome/browser/translate/translate_prefs.h
index 0adf370d6bcbfe635a16d7a5cdf08fc2181b7447..e68a1d36685a16df13bb9f09c379aec178d15f69 100644
--- a/chrome/browser/translate/translate_prefs.h
+++ b/chrome/browser/translate/translate_prefs.h
@@ -27,11 +27,11 @@ class TranslatePrefs {
 
   explicit TranslatePrefs(PrefService* user_prefs);
 
-  bool IsLanguageBlacklisted(const std::string& original_language);
+  bool IsLanguageBlacklisted(const std::string& original_language) const;
   void BlacklistLanguage(const std::string& original_language);
   void RemoveLanguageFromBlacklist(const std::string& original_language);
 
-  bool IsSiteBlacklisted(const std::string& site);
+  bool IsSiteBlacklisted(const std::string& site) const;
   void BlacklistSite(const std::string& site);
   void RemoveSiteFromBlacklist(const std::string& site);
 
@@ -42,16 +42,24 @@ class TranslatePrefs {
   void RemoveLanguagePairFromWhitelist(const std::string& original_language,
       const std::string& target_language);
 
+  // Will return true if at least one language has been blacklisted.
+  bool HasBlacklistedLanguages() const;
+  void ClearBlacklistedLanguages();
+
+  // Will return true if at least one site has been blacklisted.
+  bool HasBlacklistedSites();
+  void ClearBlacklistedSites();
+
   // These methods are used to track how many times the user has denied the
   // translation for a specific language. (So we can present a UI to black-list
   // that language if the user keeps denying translations).
-  int GetTranslationDeniedCount(const std::string& language);
+  int GetTranslationDeniedCount(const std::string& language) const;
   void IncrementTranslationDeniedCount(const std::string& language);
   void ResetTranslationDeniedCount(const std::string& language);
 
   // These methods are used to track how many times the user has accepted the
   // translation for a specific language. (So we can present a UI to white-list
-  // that langueg if the user keeps accepting translations).
+  // that language if the user keeps accepting translations).
   int GetTranslationAcceptedCount(const std::string& language);
   void IncrementTranslationAcceptedCount(const std::string& language);
   void ResetTranslationAcceptedCount(const std::string& language);
@@ -65,20 +73,21 @@ class TranslatePrefs {
 
  private:
   static void MigrateTranslateWhitelists(PrefService* user_prefs);
-  bool IsValueBlacklisted(const char* pref_id, const std::string& value);
+  bool IsValueBlacklisted(const char* pref_id, const std::string& value) const;
   void BlacklistValue(const char* pref_id, const std::string& value);
   void RemoveValueFromBlacklist(const char* pref_id, const std::string& value);
-  bool IsValueInList(const base::ListValue* list, const std::string& value);
+  bool IsValueInList(
+      const base::ListValue* list, const std::string& value) const;
   bool IsLanguageWhitelisted(const std::string& original_language,
-      std::string* target_language);
-
+      std::string* target_language) const;
+  bool IsListEmpty(const char* pref_id) const;
   // Retrieves the dictionary mapping the number of times translation has been
   // denied for a language, creating it if necessary.
   base::DictionaryValue* GetTranslationDeniedCountDictionary();
 
   // Retrieves the dictionary mapping the number of times translation has been
   // accepted for a language, creating it if necessary.
-  base::DictionaryValue* GetTranslationAcceptedCountDictionary();
+  base::DictionaryValue* GetTranslationAcceptedCountDictionary() const;
 
   PrefService* prefs_;  // Weak.
 };