Enables the user to select multiple languages for spellchecking (UI)

chrome/browser/spellchecker/spellcheck_service.h

Index: chrome/browser/spellchecker/spellcheck_service.h
diff --git a/chrome/browser/spellchecker/spellcheck_service.h b/chrome/browser/spellchecker/spellcheck_service.h
index 46a081bc1faed06a2c4c59c6f8dc590f65c34113..e1d24c71821421bfe82b1db9cabe38792bdf6153 100644
--- a/chrome/browser/spellchecker/spellcheck_service.h
+++ b/chrome/browser/spellchecker/spellcheck_service.h
@@ -56,17 +56,18 @@ class SpellcheckService : public KeyedService,
 
   // This function computes a vector of strings which are to be displayed in
   // the context menu over a text area for changing spell check languages. It
-  // returns the index of the current spell check language in the vector.
+  // returns the set of indices of the current spell check languages in the
+  // vector.
   // TODO(port): this should take a vector of base::string16, but the
   // implementation has some dependencies in l10n util that need porting first.
-  static int GetSpellCheckLanguages(content::BrowserContext* context,
-                                    std::vector<std::string>* languages);
+  static std::set<int> GetSpellCheckLanguages(
+      content::BrowserContext* context,
+      std::vector<std::string>* languages);
 
   // Computes a vector of strings which are to be displayed in the context
   // menu from |accept_languages| and |dictionary_language|.
   static void GetSpellCheckLanguagesFromAcceptLanguages(
       const std::vector<std::string>& accept_languages,
-      const std::string& dictionary_language,
       std::vector<std::string>* languages);
 
   // Signals the event attached by AttachTestEvent() to report the specified