[MD settings] hide for-current-incognito checkbox when incognito inactive

chrome/browser/resources/settings/site_settings/add_site_dialog.js

Index: chrome/browser/resources/settings/site_settings/add_site_dialog.js
diff --git a/chrome/browser/resources/settings/site_settings/add_site_dialog.js b/chrome/browser/resources/settings/site_settings/add_site_dialog.js
index 537f5cb16c0b6b8da9fbf033cee70b910d1fe423..1e02855c308c073244b3ab1c8fd7911eac45d034 100644
--- a/chrome/browser/resources/settings/site_settings/add_site_dialog.js
+++ b/chrome/browser/resources/settings/site_settings/add_site_dialog.js
@@ -25,6 +25,9 @@ Polymer({
      */
     contentSetting: String,
 
+    /** @private */
+    isIncognitoActive_: Boolean,
+
     /**
      * The site to add an exception for.
      * @private
@@ -44,8 +47,9 @@ Polymer({
    *     Block list.
    */
   open: function(type) {
-    this.addWebUIListener('onIncognitoStatusChanged',
-        this.onIncognitoStatusChanged_.bind(this));
+    this.addWebUIListener('onIncognitoStatusChanged', function(isActive) {
+      this.isIncognitoActive_ = isActive;
+    }.bind(this));
     this.browserProxy.updateIncognitoStatus();
     this.$.dialog.showModal();
   },
@@ -75,19 +79,6 @@ Polymer({
   },
 
   /**
-   * 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