Add GetSupportedLanguages(), ActiveLanguage(), and DeactivateLanguage().

chrome/browser/chromeos/language_library.h

Index: chrome/browser/chromeos/language_library.h
diff --git a/chrome/browser/chromeos/language_library.h b/chrome/browser/chromeos/language_library.h
index e79d1595ee45fa5e4d98f75aebfaf835e0668f27..88c197c9b6030376d69f977ff62e5c1b676466f2 100644
--- a/chrome/browser/chromeos/language_library.h
+++ b/chrome/browser/chromeos/language_library.h
@@ -35,11 +35,18 @@ class LanguageLibrary {
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
-  // Returns the list of IMEs and keyboard layouts we can select. If the cros
-  // library is not found or IBus/DBus daemon is not alive, this function
-  // returns a fallback language list (and never returns NULL).
+  // Returns the list of IMEs and keyboard layouts we can select
+  // (i.e. active). If the cros library is not found or IBus/DBus daemon
+  // is not alive, this function returns a fallback language list (and
+  // never returns NULL).
   InputLanguageList* GetLanguages();
 
+  // Returns the list of IMEs and keyboard layouts we support, including
+  // ones not active. If the cros library is not found or IBus/DBus
+  // daemon is not alive, this function returns a fallback language list
+  // (and never returns NULL).
+  InputLanguageList* GetSupportedLanguages();
+
   // Changes the current IME engine to |id| and enable IME (when |category|
   // is LANGUAGE_CATEGORY_IME). Changes the current XKB layout to |id| and
   // disable IME (when |category| is LANGUAGE_CATEGORY_XKB). |id| is a unique
@@ -47,6 +54,14 @@ class LanguageLibrary {
   // in src third_party/cros/ for details.
   void ChangeLanguage(LanguageCategory category, const std::string& id);
 
+  // Activates the language specified by |category| and |id|. Returns true
+  // on success.
+  bool ActivateLanguage(LanguageCategory category, const std::string& id);
+
+  // Dectivates the language specified by |category| and |id|. Returns
+  // true on success.
+  bool DeactivateLanguage(LanguageCategory category, const std::string& id);
+
   const InputLanguage& current_language() const {
     return current_language_;
   }