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

components/omnibox/browser/autocomplete_match.h

Index: components/omnibox/browser/autocomplete_match.h
diff --git a/components/omnibox/browser/autocomplete_match.h b/components/omnibox/browser/autocomplete_match.h
index 753c43a7729870a99c524d6bed67504e09de71c6..d621877eb64f3d012b5a277bc9db9b0bc8c48248 100644
--- a/components/omnibox/browser/autocomplete_match.h
+++ b/components/omnibox/browser/autocomplete_match.h
@@ -205,29 +205,23 @@ struct AutocompleteMatch {
   // starts with any the terms in input.terms_prefixed_by_http_or_https(), we
   // avoid converting an HTTPS scheme to HTTP.  This means URLs that differ
   // only by these schemes won't be marked as dupes, since the distinction
-  // seems to matter to the user.  |languages| is used to format punycoded
-  // domain names to UTF-8 for the aforementioned duplicate detection.
+  // seems to matter to the user.
   static GURL GURLToStrippedGURL(const GURL& url,
                                  const AutocompleteInput& input,
-                                 const std::string& languages,
                                  TemplateURLService* template_url_service,
                                  const base::string16& keyword);
 
   // Computes the stripped destination URL (via GURLToStrippedGURL()) and
-  // stores the result in |stripped_destination_url|.  |input| and |languages|
-  // are used for the same purpose as in GURLToStrippedGURL().
-  void ComputeStrippedDestinationURL(
-      const AutocompleteInput& input,
-      const std::string& languages,
-      TemplateURLService* template_url_service);
+  // stores the result in |stripped_destination_url|.  |input| is used for the
+  // same purpose as in GURLToStrippedGURL().
+  void ComputeStrippedDestinationURL(const AutocompleteInput& input,
+                                     TemplateURLService* template_url_service);
 
   // Sets |allowed_to_be_default_match| to true if this match is effectively
   // the URL-what-you-typed match (i.e., would be dupped against the UWYT
-  // match when AutocompleteResult merges matches).  |languages| is used
-  // for the same purpose as in GURLToStrippedGURL().
+  // match when AutocompleteResult merges matches).
   void EnsureUWYTIsAllowedToBeDefault(
       const AutocompleteInput& input,
-      const std::string& languages,
       TemplateURLService* template_url_service);
 
   // Gets data relevant to whether there should be any special keyword-related