Site Settings Desktop: Support adding exceptions for incognito mode.

chrome/browser/resources/settings/site_settings/add_site_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
  * 'add-site-dialog' provides a dialog to add exceptions for a given Content
  * Settings category.
  */
 Polymer({
   is: 'add-site-dialog',
 
-  behaviors: [SiteSettingsBehavior],
+  behaviors: [SiteSettingsBehavior, WebUIListenerBehavior],
 
   properties: {
     /**
      * The site to add an exception for.
      * @private
      */
     site_: String,
 
     /**
      * Whether this is an allow exception this dialog is adding.
      */
      allowException: Boolean,
   },
 
   /**
    * Opens the dialog.
    * @param {string} type Whether this was launched from an Allow list or a
    *     Block list.
    */
   open: function(type) {
+    this.addWebUIListener('onIncognitoStatusChanged',
+        this.onIncognitoStatusChanged_.bind(this));
     this.allowException = type == settings.PermissionValues.ALLOW;
+    this.browserProxy.updateIncognitoStatus();

[dschuyler, 2016/09/01 23:13:49]

Optional: does the UI going into the dialog
flicker at all? I'm wondering if there is a timing
issue where the update would arrive after the dialog
just opened and create a flicker. If so, maybe
return a promise from updateIncognitoStatus()
and call this.$.dialog.showModal() inside the
.then(). If there is no flicker to fix then 
there's no need for the promise (I'm just guessing
that there may be flicker).

[Finnur, 2016/09/02 15:44:14]

No, I haven't noticed that but I'll keep an eye on it. Appreciate the suggestion
on how to potentially fix it!

     this.$.dialog.showModal();
   },
 
   /**
    * Validates that the pattern entered is valid.
    * @private
    */
   validate_: function() {
     var pattern = this.addPatternWildcard(this.site_);
     this.browserProxy.isPatternValid(pattern).then(function(isValid) {
       this.$.add.disabled = !isValid;
     }.bind(this));
   },
 
   /** @private */
   onCancelTap_: function() {
     this.$.dialog.cancel();
   },
 
   /**
+   * A handler for when we get notified of the current profile creating or
+   * destroying their incognito counterpart.
+   * @param {boolean} incognitoEnabled Whether the current profile has an
+   *     incognito profile.
+   * @private
+   */
+  onIncognitoStatusChanged_: function(incognitoEnabled) {
+    this.$.incognito.disabled = !incognitoEnabled;
+    if (!incognitoEnabled)
+      this.$.incognito.checked = false;
+  },
+
+  /**
    * The tap handler for the Add [Site] button (adds the pattern and closes
    * the dialog).
    * @private
    */
   onSubmit_: function() {
     if (this.$.add.disabled)
       return;  // Can happen when Enter is pressed.
     var pattern = this.addPatternWildcard(this.site_);
-    this.setCategoryPermissionForOrigin(
+    this.browserProxy.setCategoryPermissionForOrigin(
         pattern, pattern, this.category, this.allowException ?
-            settings.PermissionValues.ALLOW : settings.PermissionValues.BLOCK);
+            settings.PermissionValues.ALLOW : settings.PermissionValues.BLOCK,
+        this.$.incognito.checked);
     this.$.dialog.close();
   },
 });