Make the authentication service remember selected usernames.

services/authenticating_url_loader/authenticating_url_loader_factory_impl.cc

Index: services/authenticating_url_loader/authenticating_url_loader_factory_impl.cc
diff --git a/services/authenticating_url_loader/authenticating_url_loader_factory_impl.cc b/services/authenticating_url_loader/authenticating_url_loader_factory_impl.cc
index 4eba37509de7c48beb81097c382b6ebf9e6a7bc4..795ce0c49dcc31f0bb515d2d308b995930267295 100644
--- a/services/authenticating_url_loader/authenticating_url_loader_factory_impl.cc
+++ b/services/authenticating_url_loader/authenticating_url_loader_factory_impl.cc
@@ -53,8 +53,8 @@ void AuthenticatingURLLoaderFactoryImpl::RetrieveToken(
       return;
     }
     authentication_service_->SelectAccount(
-        base::Bind(&AuthenticatingURLLoaderFactoryImpl::OnAccountSelected,
-                   base::Unretained(this), origin));
+        true, base::Bind(&AuthenticatingURLLoaderFactoryImpl::OnAccountSelected,
+                         base::Unretained(this), origin));
   }
   pendings_retrieve_token_[origin].push_back(callback);
 }