Removing FRE UI for unicorn accounts.

chrome/browser/supervised_user/child_accounts/child_account_service.cc

Index: chrome/browser/supervised_user/child_accounts/child_account_service.cc
diff --git a/chrome/browser/supervised_user/child_accounts/child_account_service.cc b/chrome/browser/supervised_user/child_accounts/child_account_service.cc
index e01f582e936c91a14a922b990a2f178c87920f5d..ebba0fc8293ce60099398660c29e34b8f35fd1a8 100644
--- a/chrome/browser/supervised_user/child_accounts/child_account_service.cc
+++ b/chrome/browser/supervised_user/child_accounts/child_account_service.cc
@@ -27,6 +27,7 @@
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
+#include "components/pref_registry/pref_registry_syncable.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 
@@ -94,6 +95,14 @@ bool ChildAccountService::IsChildAccountDetectionEnabled() {
   return group_name == "Enabled";
 }
 
+void ChildAccountService::RegisterProfilePrefs(
+    user_prefs::PrefRegistrySyncable* registry) {
+  registry->RegisterBooleanPref(
+      prefs::kChildAccountStatusKnown,
+      false,
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+}
+
 void ChildAccountService::SetIsChildAccount(bool is_child_account) {
   PropagateChildStatusToUser(is_child_account);
   if (profile_->IsChild() == is_child_account)
@@ -120,6 +129,10 @@ void ChildAccountService::Init() {
     StartFetchingServiceFlags();
 }
 
+bool ChildAccountService::IsChildAccountStatusKnown() {
+  return profile_->GetPrefs()->GetBoolean(prefs::kChildAccountStatusKnown);
+}
+
 void ChildAccountService::Shutdown() {
   family_fetcher_.reset();
   CancelFetchingServiceFlags();
@@ -128,6 +141,15 @@ void ChildAccountService::Shutdown() {
   SigninManagerFactory::GetForProfile(profile_)->RemoveObserver(this);
 }
 
+
+void ChildAccountService::AddChildStatusReceivedCallback(
+    const base::Closure& callback) {
+  if (IsChildAccountStatusKnown())
+    callback.Run();
+  else
+    status_received_callback_list_.push_back(callback);
+}
+
 bool ChildAccountService::SetActive(bool active) {
   if (!profile_->IsChild() && !active_)
     return false;
@@ -284,12 +306,6 @@ void ChildAccountService::StartFetchingServiceFlags() {
   }
   account_id_ = SigninManagerFactory::GetForProfile(profile_)
       ->GetAuthenticatedAccountId();
-  flag_fetcher_.reset(new AccountServiceFlagFetcher(
-      account_id_,
-      ProfileOAuth2TokenServiceFactory::GetForProfile(profile_),
-      profile_->GetRequestContext(),
-      base::Bind(&ChildAccountService::OnFlagsFetched,
-                 weak_ptr_factory_.GetWeakPtr())));
 }
 
 void ChildAccountService::CancelFetchingServiceFlags() {
@@ -324,6 +340,17 @@ void ChildAccountService::OnFlagsFetched(
   bool is_child_account =
       std::find(flags.begin(), flags.end(),
                 kIsChildAccountServiceFlagName) != flags.end();
+
+  bool status_was_known = profile_->GetPrefs()->GetBoolean(
+      prefs::kChildAccountStatusKnown);
+  profile_->GetPrefs()->SetBoolean(prefs::kChildAccountStatusKnown, true);
+
+  if (!status_was_known) {
+    for (auto& callback : status_received_callback_list_)
+      callback.Run();
+    status_received_callback_list_.clear();
+  }
+
   SetIsChildAccount(is_child_account);
 
   ScheduleNextStatusFlagUpdate(