PolicyData proto: Obsolete "consumer" ManagementMode

Removing another remainder of consumer enrollment.

BUG=636318

Review-Url: https://codereview.chromium.org/2886403004
Cr-Commit-Position: refs/heads/master@{#472808}
diff --git a/chrome/browser/chromeos/ownership/owner_settings_service_chromeos.cc b/chrome/browser/chromeos/ownership/owner_settings_service_chromeos.cc
index b1d8e66..89a2508 100644
--- a/chrome/browser/chromeos/ownership/owner_settings_service_chromeos.cc
+++ b/chrome/browser/chromeos/ownership/owner_settings_service_chromeos.cc
@@ -405,10 +405,8 @@
   policy->set_timestamp(
       (base::Time::Now() - base::Time::UnixEpoch()).InMilliseconds());
   policy->set_username(user_id);
-  if (policy_data->management_mode() == em::PolicyData::LOCAL_OWNER ||
-      policy_data->management_mode() == em::PolicyData::CONSUMER_MANAGED) {
+  if (policy_data->management_mode() == em::PolicyData::LOCAL_OWNER)
     FixupLocalOwnerPolicy(user_id, settings);
-  }
   if (!settings->SerializeToString(policy->mutable_policy_value()))
     return std::unique_ptr<em::PolicyData>();
 
diff --git a/components/policy/proto/device_management_backend.proto b/components/policy/proto/device_management_backend.proto
index 855fa6a1..b557242 100644
--- a/components/policy/proto/device_management_backend.proto
+++ b/components/policy/proto/device_management_backend.proto
@@ -381,9 +381,8 @@
     // The device is enterprise-managed. The policies come from the enterprise
     // server. See the comment above for backward compatibility.
     ENTERPRISE_MANAGED = 1;
-    // The device is consumer-managed. The policies currently can only be set
-    // by the local owner of the device.
-    CONSUMER_MANAGED = 2;
+    // Obsolete. Don't use.
+    OBSOLETE_CONSUMER_MANAGED = 2;
   }
   optional ManagementMode management_mode = 16;