[MD settings] hide option for incognito on session only exceptions

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

Index: chrome/browser/resources/settings/site_settings/site_list.js
diff --git a/chrome/browser/resources/settings/site_settings/site_list.js b/chrome/browser/resources/settings/site_settings/site_list.js
index 82d5580fe5c768f19752bd5b578d3f8406dbe9b2..7c17e9de5607855ca2dbe4a47276a80c064ff37a 100644
--- a/chrome/browser/resources/settings/site_settings/site_list.js
+++ b/chrome/browser/resources/settings/site_settings/site_list.js
@@ -109,7 +109,7 @@ Polymer({
   },
 
   /**
-   * The element to return focus to, when the currntly active dialog is closed.
+   * The element to return focus to, when the currently active dialog is closed.
    * @private {?HTMLElement}
    */
   activeDialogAnchor_: null,
@@ -136,7 +136,7 @@ Polymer({
 
   /**
    * Called for each site list when incognito is enabled or disabled. Only
-   * called on change (opening N incogito windows only fires one message).
+   * called on change (opening N incognito windows only fires one message).
    * Another message is sent when the *last* incognito window closes.
    * @private
    */