MD Settings: Polish for Languages main page

chrome/browser/resources/settings/languages_page/languages.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview 'settings-languages' handles Chrome's language and input
  * method settings. The 'languages' property, which reflects the current
  * language settings, must not be changed directly. Instead, changes to
  * language settings should be made using the LanguageHelper APIs provided by
  * this class via languageHelper.
@@ skipping 558 matching lines @@
       if (this.enabledLanguageSet_.has(languageCodes[newIndex]))
         distance--;
     }
 
     languageCodes[originalIndex] = languageCodes[newIndex];
     languageCodes[newIndex] = languageCode;
     this.setPrefValue(preferredLanguagesPrefName, languageCodes.join(','));
   },
 
   /**
+   * Moves the language directly to the front of the list of enabled languages.
+   * @param {string} languageCode
+   */
+  moveLanguageToFront: function(languageCode) {
+    if (!CrSettingsPrefs.isInitialized)
+      return;
+
+    var languageCodes =
+        this.getPref(preferredLanguagesPrefName).value.split(',');
+    var originalIndex = languageCodes.indexOf(languageCode);
+    assert(originalIndex != -1);
+
+    languageCodes.splice(originalIndex, 1);
+    languageCodes.unshift(languageCode);
+
+    this.setPrefValue(preferredLanguagesPrefName, languageCodes.join(','));
+  },
+
+  /**
    * Enables translate for the given language by removing the translate
    * language from the blocked languages preference.
    * @param {string} languageCode
    */
   enableTranslateLanguage: function(languageCode) {
     languageCode = this.convertLanguageCodeForTranslate(languageCode);
     this.deletePrefListItem('translate_blocked_languages', languageCode);
   },
 
   /**
@@ skipping 137 matching lines @@
     this.updateEnabledInputMethods_();
   },
 
   /** @param {string} id Removed input method ID. */
   onInputMethodRemoved_: function(id) {
     assert(cr.isChromeOS);
     this.updateEnabledInputMethods_();
   },
 });
 })();