Track whether a given user session has completed initialization, and use

components/user_manager/user_unittest.cc

Index: components/user_manager/user_unittest.cc
diff --git a/components/user_manager/user_unittest.cc b/components/user_manager/user_unittest.cc
index 05f563f5d2dc4d13ce564f7d9f5a511db63f0047..ecb97cc5af7a498f95c1bd0ba9618a9b937ecaf8 100644
--- a/components/user_manager/user_unittest.cc
+++ b/components/user_manager/user_unittest.cc
@@ -44,4 +44,12 @@ TEST(UserTest, DeviceLocalAccountAffiliation) {
   EXPECT_TRUE(arc_kiosk_user.IsAffiliated());
 }
 
+TEST(UserTest, UserSessionInitialized) {
+  const AccountId account_id = AccountId::FromUserEmailGaiaId(kEmail, kGaiaId);
+  std::unique_ptr<User> user(User::CreateRegularUser(account_id));
+  EXPECT_FALSE(user->session_initialized());
+  user->set_session_initialized(true);
+  EXPECT_TRUE(user->session_initialized());
+}
+
 }  // namespace user_manager