MD Settings: indicate extension controlled search engines

chrome/browser/resources/settings/search_engines_page/search_engine_entry.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-search-engine-entry' is a component for showing a
  * search engine with its name, domain and query URL.
  */
 Polymer({
   is: 'settings-search-engine-entry',
 
   properties: {
     /** @type {!SearchEngine} */
     engine: Object,
 
-    /** @private {boolean} */
-    showEditSearchEngineDialog_: Boolean,
-
     /** @type {boolean} */
     isDefault: {
       reflectToAttribute: true,
       type: Boolean,
       computed: 'computeIsDefault_(engine)'
     },
+
+    /** @private {boolean} */
+    showDots_: {
+      reflectToAttribute: true,
+      type: Boolean,
+      computed: 'computeShowDots_(engine.canBeDefault,' +
+                                 'engine.canBeEdited,' +
+                                 'engine.canBeRemoved)',
+    },
+
+    /** @private {boolean} */
+    showEditSearchEngineDialog_: Boolean,
   },
 
   /** @private {settings.SearchEnginesBrowserProxy} */
   browserProxy_: null,
 
   /** @override */
   created: function() {
     this.browserProxy_ = settings.SearchEnginesBrowserProxyImpl.getInstance();
   },
 
+  /** @private */
+  closePopupMenu_: function() {
+    this.$$('dialog[is=cr-action-menu]').close();
+  },
+
   /**
    * @return {boolean}
    * @private
    */
   computeIsDefault_: function() {
     return this.engine.default;
   },
 
+  /**
+   * @param {boolean} canBeDefault
+   * @param {boolean} canBeEdited
+   * @param {boolean} canBeRemoved
+   * @return {boolean} Whether to show the dots menu.
+   * @private
+   */
+  computeShowDots_: function(canBeDefault, canBeEdited, canBeRemoved) {
+    return canBeDefault || canBeEdited || canBeRemoved;
+  },
+
+  /**
+   * @param {?string} url The icon URL if available.
+   * @return {string} A set of icon URLs.
+   * @private
+   */
+  getIconSet_: function(url) {
+    // Force default icon, if no |engine.iconURL| is available.
+    return cr.icon.getFavicon(url || '');
+  },
+
   /** @private */
   onDeleteTap_: function() {
     this.browserProxy_.removeSearchEngine(this.engine.modelIndex);
     this.closePopupMenu_();
   },
 
   /** @private */
+  onDotsTap_: function() {
+    /** @type {!CrActionMenuElement} */ (
+        this.$$('dialog[is=cr-action-menu]')).showAt(
+            assert(this.$$('paper-icon-button')));
+  },
+
+  /** @private */
   onEditTap_: function() {
     this.closePopupMenu_();
 
     this.showEditSearchEngineDialog_ = true;
     this.async(function() {
       var dialog = this.$$('settings-search-engine-dialog');
       // Register listener to detect when the dialog is closed. Flip the boolean
       // once closed to force a restamp next time it is shown such that the
       // previous dialog's contents are cleared.
       dialog.addEventListener('close', function() {
         this.showEditSearchEngineDialog_ = false;
       }.bind(this));
     }.bind(this));
   },
 
   /** @private */
   onMakeDefaultTap_: function() {
     this.closePopupMenu_();
     this.browserProxy_.setDefaultSearchEngine(this.engine.modelIndex);
   },
-
-  /** @private */
-  closePopupMenu_: function() {
-    this.$$('dialog[is=cr-action-menu]').close();
-  },
-
-  /**
-   * @param {?string} url The icon URL if available.
-   * @return {string} A set of icon URLs.
-   * @private
-   */
-  getIconSet_: function(url) {
-    // Force default icon, if no |engine.iconURL| is available.
-    return cr.icon.getFavicon(url || '');
-  },
-
-  /** @private */
-  onDotsTap_: function() {
-    /** @type {!CrActionMenuElement} */ (
-        this.$$('dialog[is=cr-action-menu]')).showAt(
-            assert(this.$$('paper-icon-button')));
-  },
 });