Added translation policy API.

components/translate/core/browser/translate_ui_delegate.h

Index: components/translate/core/browser/translate_ui_delegate.h
diff --git a/components/translate/core/browser/translate_ui_delegate.h b/components/translate/core/browser/translate_ui_delegate.h
index 230a68cd6c973319c5dc5c44c80408990aae1294..399caddbeeb59050fb6fa851c7e188fec523b8be 100644
--- a/components/translate/core/browser/translate_ui_delegate.h
+++ b/components/translate/core/browser/translate_ui_delegate.h
@@ -77,6 +77,9 @@ class TranslateUIDelegate {
   // Returns the ISO code for the language at |index|.
   std::string GetLanguageCodeAt(size_t index) const;
 
+  // Returns the index of |language_code|.
+  size_t GetLanguageIndex(const std::string& language_code);
+
   // Returns the displayable name for the language at |index|.
   base::string16 GetLanguageNameAt(size_t index) const;
 
@@ -101,15 +104,30 @@ class TranslateUIDelegate {
   // Returns true if the current language is blocked.
   bool IsLanguageBlocked();
 
+  // Returns true if |language_code| is blocked. |language_code| must not be
+  // empty.
+  bool IsLanguageBlocked(const std::string& language_code);
+
   // Sets the value if the current language is blocked.
   void SetLanguageBlocked(bool value);
 
+  // Blocks/unblocks |language_code| for translation. |language_code| must not
+  // be empty.
+  void SetLanguageBlocked(bool value, const std::string& language_code);
+
   // Returns true if the current webpage is blacklisted.
   bool IsSiteBlacklisted();
 
+  // Returns true if |page_host| is blacklisted. |page_host| must not be empty.
+  bool IsSiteBlacklisted(const std::string& page_host);
+
   // Sets the value if the current webpage is blacklisted.
   void SetSiteBlacklist(bool value);
 
+  // Sets the value if the |page_host| is blacklisted. |page_host| must not be
+  // empty.
+  void SetSiteBlacklist(bool value, const std::string& page_host);
+
   // Returns true if the webpage in the current original language should be
   // translated into the current target language automatically.
   bool ShouldAlwaysTranslate();
@@ -118,6 +136,20 @@ class TranslateUIDelegate {
   // translated into the current target language automatically.
   void SetAlwaysTranslate(bool value);
 
+  // If |value| is true, updates the preference to always translate
+  // |from_language| to |to_language| without prompting. If it is called
+  // multiple times for the same |from_language|, the last specified
+  // |to_language| is used.
+  // If |value| is false, updates the preference not to always translate
+  // |from_language|. |target_language| is ignored.
+  void SetAlwaysTranslate(bool value,
+                          const std::string& from_language,
+                          const std::string& to_language);
+
+  // Returns the language to always translate |from_language| to, or empty
+  // string if no such language has been set.
+  std::string GetAlwaysTranslateToLanguage(const std::string& from_language);
+
   // Returns true if the Always Translate checkbox should be checked by default.
   bool ShouldAlwaysTranslateBeCheckedByDefault();