Restore missing "insession" accidentally deleted in refactor

Bug: 930109
Change-Id: I64848ce01b47350b3d04967be873f93ce5c4977a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1692754Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Commit-Queue: Roman Sorokin [CET] <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#675703}

chrome/browser/ui/webui/chromeos/in_session_password_change/password_change_handler.cc

@@ -43,7 +43,7 @@ void PasswordChangeHandler::HandleInitialize(const base::ListValue* value) {
       ProfileHelper::Get()->GetUserByProfile(profile);
   if (user)
     params.SetKey("userName", base::Value(user->GetDisplayEmail()));
-  CallJavascriptFunction(".password.change.loadAuthExtension", params);
+  CallJavascriptFunction("insession.password.change.loadAuthExtension", params);
 }
 
 void PasswordChangeHandler::HandleChangePassword(