MD Settings: Manage search engines, localizing/adding strings.

chrome/browser/resources/settings/search_engines_page/search_engine_dialog.js

 // Copyright 2016 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-search-engine-dialog' is a component for adding
  * or editing a search engine entry.
  *
  * @group Chrome Settings Elements
  * @element settings-search-engine-dialog
@@ skipping 32 matching lines @@
    * The |modelIndex| to use when a new search engine is added. Must match with
    * kNewSearchEngineIndex constant specified at
    * chrome/browser/ui/webui/settings/search_engines_handler.cc
    * @const {number}
    */
   DEFAULT_MODEL_INDEX: -1,
 
   /** @override */
   ready: function() {
     if (this.model) {
-      // TODO(dpapad): Localize strings.
-      this.dialogTitle_ = 'Edit search engine';
-      this.actionButtonText_ = 'Edit';
+      this.dialogTitle_ =
+          loadTimeData.getString('searchEnginesEditSearchEngine');
+      this.actionButtonText_ = loadTimeData.getString('save');
 
       // If editing an existing search engine, pre-populate the input fields.
       this.searchEngine_ = this.model.displayName;
       this.keyword_ = this.model.keyword;
       this.queryUrl_ = this.model.url;
     } else {
-      // TODO(dpapad): Localize string.
-      this.dialogTitle_ = 'Add search engine';
-      this.actionButtonText_ = loadTimeData.getString('searchEnginesAdd');
+      this.dialogTitle_ =
+          loadTimeData.getString('searchEnginesAddSearchEngine');
+      this.actionButtonText_ = loadTimeData.getString('add');
     }
   },
 
   /** @override */
   attached: function() {
     this.browserProxy_ = settings.SearchEnginesBrowserProxy.getInstance();
     this.updateActionButtonState_();
     this.browserProxy_.searchEngineEditStarted(
         this.model ? this.model.modelIndex : this.DEFAULT_MODEL_INDEX);
     this.$.dialog.open();
@@ skipping 32 matching lines @@
   /** @private */
   updateActionButtonState_: function() {
     var allValid = [
       this.$.searchEngine, this.$.keyword, this.$.queryUrl
     ].every(function(inputElement) {
       return !inputElement.invalid && inputElement.value.length != 0;
     });
     this.$.actionButton.disabled = !allValid;
   },
 });