Mark two signin_manager_base methods as protected instead of public.

These methods are only called from child classes.

Change-Id: I3b5d518ba5eb78a1d01c40c79d7d133567f42396
Bug: 928680
Reviewed-on: https://chromium-review.googlesource.com/c/1454542
Reviewed-by: Colin Blundell <blundell@chromium.org>
Commit-Queue: Lowell Manners <lowell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#631253}
1 file changed