Drop |languages| from {Format,Elide}Url* and IDNToUnicode

components/omnibox/browser/in_memory_url_index.h

Index: components/omnibox/browser/in_memory_url_index.h
diff --git a/components/omnibox/browser/in_memory_url_index.h b/components/omnibox/browser/in_memory_url_index.h
index 1f098cbfedd36d1146416ed6e8146c8071b3a103..3b0fa4175196156b107e88f4bfe1cb4e48103c01 100644
--- a/components/omnibox/browser/in_memory_url_index.h
+++ b/components/omnibox/browser/in_memory_url_index.h
@@ -103,15 +103,12 @@ class InMemoryURLIndex : public KeyedService,
   // |history_service| which may be null during unit testing is used to register
   // |as an HistoryServiceObserver. |history_dir| is a path to the directory
   // containing the history database within the profile wherein the cache and
-  // transaction journals will be stored. |languages| gives a list of language
-  // encodings by which URLs and omnibox searches are broken down into words and
-  // characters.
+  // transaction journals will be stored.
   InMemoryURLIndex(bookmarks::BookmarkModel* bookmark_model,
                    history::HistoryService* history_service,
                    TemplateURLService* template_url_service,
                    base::SequencedWorkerPool* worker_pool,
                    const base::FilePath& history_dir,
-                   const std::string& languages,
                    const SchemeSet& client_schemes_to_whitelist);
   ~InMemoryURLIndex() override;
 
@@ -160,9 +157,7 @@ class InMemoryURLIndex : public KeyedService,
   class RebuildPrivateDataFromHistoryDBTask : public history::HistoryDBTask {
    public:
     explicit RebuildPrivateDataFromHistoryDBTask(
-        InMemoryURLIndex* index,
-        const std::string& languages,
-        const SchemeSet& scheme_whitelist);
+        InMemoryURLIndex* index, const SchemeSet& scheme_whitelist);
 
     bool RunOnDBThread(history::HistoryBackend* backend,
                        history::HistoryDatabase* db) override;
@@ -172,7 +167,6 @@ class InMemoryURLIndex : public KeyedService,
     ~RebuildPrivateDataFromHistoryDBTask() override;
 
     InMemoryURLIndex* index_;  // Call back to this index at completion.
-    std::string languages_;    // Languages for word-breaking.
     SchemeSet scheme_whitelist_;  // Schemes to be indexed.
     bool succeeded_;  // Indicates if the rebuild was successful.
     scoped_refptr<URLIndexPrivateData> data_;  // The rebuilt private data.
@@ -289,9 +283,6 @@ class InMemoryURLIndex : public KeyedService,
   // be empty.
   base::FilePath history_dir_;
 
-  // Languages used during the word-breaking process during indexing.
-  std::string languages_;
-
   // Only URLs with a whitelisted scheme are indexed.
   SchemeSet scheme_whitelist_;