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 1e906124a4b7ba4cd6950fc33d535a2f32049a8e..5b7dd29e9c29aa4011ebf6a3653d3c8ef4067cc8 100644
--- a/chrome/browser/supervised_user/child_accounts/child_account_service.cc
+++ b/chrome/browser/supervised_user/child_accounts/child_account_service.cc
@@ -26,6 +26,7 @@
 #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"
 
@@ -75,6 +76,15 @@ ChildAccountService::ChildAccountService(Profile* profile)
 
 ChildAccountService::~ChildAccountService() {}
 
+// static
+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)
@@ -101,6 +111,10 @@ void ChildAccountService::Init() {
     StartFetchingServiceFlags();
 }
 
+bool ChildAccountService::IsChildAccountStatusKnown() {
+  return profile_->GetPrefs()->GetBoolean(prefs::kChildAccountStatusKnown);
+}
+
 void ChildAccountService::Shutdown() {
   family_fetcher_.reset();
   CancelFetchingServiceFlags();
@@ -109,6 +123,12 @@ void ChildAccountService::Shutdown() {
   SigninManagerFactory::GetForProfile(profile_)->RemoveObserver(this);
 }
 
+
+void ChildAccountService::AddChildStatusReceivedCallback(
+    base::Closure callback) {
+  status_received_callback_list_.push_back(callback);

[Marc Treib, 2015/03/10 12:01:35]

What if the status is already known? We might want to call the callback
directly, or otherwise at least add some warning that it won't ever be called.

+}
+
 bool ChildAccountService::SetActive(bool active) {
   if (!profile_->IsChild() && !active_)
     return false;
@@ -295,6 +315,16 @@ 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();
+  }

[Marc Treib, 2015/03/10 12:01:35]

Also clear the list of callbacks here, since we won't need them again?

[merkulova, 2015/03/10 13:36:18]

Done.

+
   SetIsChildAccount(is_child_account);
 
   ScheduleNextStatusFlagUpdate(