[MD settings] do not send embedded origin when editing

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

Index: chrome/browser/resources/settings/site_settings/edit_exception_dialog.js
diff --git a/chrome/browser/resources/settings/site_settings/edit_exception_dialog.js b/chrome/browser/resources/settings/site_settings/edit_exception_dialog.js
index bc5cc80243014c250b17c70c493a15db63e53a58..6e7070a9dd7d60eef1dcd169c5dd340285b4ae12 100644
--- a/chrome/browser/resources/settings/site_settings/edit_exception_dialog.js
+++ b/chrome/browser/resources/settings/site_settings/edit_exception_dialog.js
@@ -51,9 +51,8 @@ Polymer({
       // The way to "edit" an exception is to remove it and and a new one.
       this.browserProxy_.resetCategoryPermissionForOrigin(
           this.model.origin,
-          this.model.embeddingOrigin,
-          this.model.category,
-          this.model.incognito);
+          '',  // Do not send an embeddedOrigin when editing.
+          this.model.category, this.model.incognito);
 
       this.browserProxy_.setCategoryPermissionForOrigin(
           this.origin_,