Add chrome.searchEnginesPrivate API and Search Settings page.

chrome/browser/resources/settings/search_page/search_page.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
+ * 'cr-settings-search-page' is the settings page containing search settings.
+ *
+ * Example:
+ *
+ *    <core-animated-pages>
+ *      <cr-settings-search-page prefs="{{prefs}}"></cr-settings-search-page>
+ *      ... other pages ...
+ *    </core-animated-pages>
+ *
+ * @group Chrome Settings Elements
+ * @element cr-settings-search-page
+ */
+Polymer('cr-settings-search-page', {
+  publish: {
+    /**
+     * Preferences state.
+     *
+     * @attribute prefs
+     * @type {CrSettingsPrefsElement}
+     * @default null
+     */
+    prefs: null,
+
+    /**
+     * Whether the page is a subpage.
+     *
+     * @attribute subpage
+     * @type {boolean}
+     * @default false
+     */
+    subpage: false,
+
+    /**
+     * ID of the page.
+     *
+     * @attribute PAGE_ID
+     * @const {string}
+     * @default 'search'
+     */
+    PAGE_ID: 'search',
+
+    /**
+     * Title for the page header and navigation menu.
+     *
+     * @attribute pageTitle
+     * @type {string}
+     */
+    pageTitle: loadTimeData.getString('searchPageTitle'),
+
+    /**
+     * Name of the 'core-icon' to be shown in the settings-page-header.
+     *
+     * @attribute icon
+     * @type {string}
+     * @default 'search'
+     */
+    icon: 'search',
+
+    /**
+     * List of default search engines available.
+     *
+     * @attribute searchEngines
+     * @type {Array<!SearchEngine}
+     * @default null
+     */
+    searchEngines: null,
+
+    /**
+     * GUID of the currently selected default search engine.
+     *
+     * @attribute defaultEngineGuid
+     * @type {string}
+     * @default ''
+     */
+    defaultEngineGuid: '',
+  },
+
+  /** @override */
+  created: function() {
+    this.searchEngines = [];
+  },
+
+  /** @override */
+  domReady: function() {
+    chrome.searchEnginesPrivate.onDefaultSearchEnginesChanged.addListener(
+        this.updateSearchEngines_.bind(this));
+    chrome.searchEnginesPrivate.getDefaultSearchEngines(
+        this.updateSearchEngines_.bind(this));
+  },
+
+  /**
+   * Persists the new default search engine back to Chrome. Called when the
+   * user selects a new default in the search engines dropdown.
+   */
+  defaultEngineGuidChanged: function() {
+    chrome.searchEnginesPrivate.setSelectedSearchEngine(this.defaultEngineGuid);
+  },
+
+
+  /**
+   * Updates the list of search engines with the given |engines|.
+   * @param {!Array<!SearchEngine>} engines
+   * @private
+   */
+  updateSearchEngines_: function(engines) {
+    this.searchEngines = engines;
+    for (var i = 0; i < engines.length; i++) {
+      if (engines[i].isSelected) {
+        this.defaultEngineGuid = engines[i].guid;
+      }
+    }
+  }
+});