Use the Windows MDM API to check if the machine is being managed.

components/update_client/updater_state_unittest.cc

Index: components/update_client/updater_state_unittest.cc
diff --git a/components/update_client/updater_state_unittest.cc b/components/update_client/updater_state_unittest.cc
index 9d34ba5785df71c23cff9a580e7ee8a3925b31ca..92e846c0894289ceea14f417210d1bc8fd5351ff 100644
--- a/components/update_client/updater_state_unittest.cc
+++ b/components/update_client/updater_state_unittest.cc
@@ -26,7 +26,7 @@ TEST_F(UpdaterStateTest, Serialize) {
   updater_state.updater_version_ = base::Version("1.0");
   updater_state.last_autoupdate_started_ = base::Time::NowFromSystemTime();
   updater_state.last_checked_ = base::Time::NowFromSystemTime();
-  updater_state.is_joined_to_domain_ = false;
+  updater_state.is_enterprise_user_ = false;
   updater_state.is_autoupdate_check_enabled_ = true;
   updater_state.update_policy_ = 1;
 
@@ -88,7 +88,7 @@ TEST_F(UpdaterStateTest, Serialize) {
   attributes = updater_state.BuildAttributes();
   EXPECT_EQ(0u, attributes.count("lastchecked"));
 
-  updater_state.is_joined_to_domain_ = true;
+  updater_state.is_enterprise_user_ = true;
   attributes = updater_state.BuildAttributes();
   EXPECT_STREQ("1", attributes.at("domainjoined").c_str());