Move helper methods from i18n extension into runtime.

src/extensions/i18n/i18n-utils.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 237 matching lines @@
 
   return resolved;
 }
 
 
 /**
  * Returns best matched supported locale and extension info using basic
  * lookup algorithm.
  */
 function lookupMatcher(service, requestedLocales) {
-  native function NativeJSGetDefaultICULocale();
-
   if (service.match(SERVICE_RE) === null) {
     throw new Error('Internal error, wrong service type: ' + service);
   }
 
   // Cache these, they don't ever change per service.
   if (AVAILABLE_LOCALES[service] === undefined) {
     AVAILABLE_LOCALES[service] = getAvailableLocalesOf(service);
   }
 
   for (var i = 0; i < requestedLocales.length; ++i) {
@@ skipping 10 matching lines @@
       var pos = locale.lastIndexOf('-');
       if (pos === -1) {
         break;
       }
       locale = locale.substring(0, pos);
     } while (true);
   }
 
   // Didn't find a match, return default.
   if (DEFAULT_ICU_LOCALE === undefined) {
-    DEFAULT_ICU_LOCALE = NativeJSGetDefaultICULocale();
+    DEFAULT_ICU_LOCALE = %GetDefaultICULocale();
   }
 
   return {'locale': DEFAULT_ICU_LOCALE, 'extension': '', 'position': -1};
 }
 
 
 /**
  * Returns best matched supported locale and extension info using
  * implementation dependend algorithm.
  */
@@ skipping 138 matching lines @@
  * It's sometimes desireable to leave user requested locale instead of ICU
  * supported one (zh-TW is equivalent to zh-Hant-TW, so we should keep shorter
  * one, if that was what user requested).
  * This function returns user specified tag if its maximized form matches ICU
  * resolved locale. If not we return ICU result.
  */
 function getOptimalLanguageTag(original, resolved) {
   // Returns Array<Object>, where each object has maximized and base properties.
   // Maximized: zh -> zh-Hans-CN
   // Base: zh-CN-u-ca-gregory -> zh-CN
-  native function NativeJSGetLanguageTagVariants();
-
   // Take care of grandfathered or simple cases.
   if (original === resolved) {
     return original;
   }
 
-  var locales = NativeJSGetLanguageTagVariants([original, resolved]);
+  var locales = %GetLanguageTagVariants([original, resolved]);
   if (locales[0].maximized !== locales[1].maximized) {
     return resolved;
   }
 
   // Preserve extensions of resolved locale, but swap base tags with original.
   var resolvedBase = new RegExp('^' + locales[1].base);
   return resolved.replace(resolvedBase, locales[0].base);
 }
 
 
 /**
  * Returns an Object that contains all of supported locales for a given
  * service.
  * In addition to the supported locales we add xx-ZZ locale for each xx-Yyyy-ZZ
  * that is supported. This is required by the spec.
  */
 function getAvailableLocalesOf(service) {
-  native function NativeJSAvailableLocalesOf();
-  var available = NativeJSAvailableLocalesOf(service);
+  var available = %AvailableLocalesOf(service);
 
   for (var i in available) {
     if (available.hasOwnProperty(i)) {
       var parts = i.match(/^([a-z]{2,3})-([A-Z][a-z]{3})-([A-Z]{2})$/);
       if (parts !== null) {
         // Build xx-ZZ. We don't care about the actual value,
         // as long it's not undefined.
         available[parts[1] + '-' + parts[3]] = null;
       }
     }
@@ skipping 46 matching lines @@
   }
 }
 
 
 /**
  * Returns titlecased word, aMeRricA -> America.
  */
 function toTitleCaseWord(word) {
   return word.substr(0, 1).toUpperCase() + word.substr(1).toLowerCase();
 }