Start ARC and sign in after Chrome OS login

chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc

Index: chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
diff --git a/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc b/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
index 017ecaa23967ecdede358b9d5744db36615be9a9..b244d98b35fb9dff0a6ae270a9ff265aac79020d 100644
--- a/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
+++ b/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
@@ -141,7 +141,13 @@ void DeleteAppFolderFromFileThread(const base::FilePath& path) {
   DCHECK(deleted);
 }
 
+bool IsPersistentArc() {
+  return arc::ArcSessionManager::Get()->IsPersistentArc();
+}
+
 bool IsArcEnabled() {
+  if (IsPersistentArc())
+    return true;
   const auto* arc_session_manager = arc::ArcSessionManager::Get();
   return arc_session_manager && arc_session_manager->IsArcPlayStoreEnabled();
 }
@@ -417,7 +423,7 @@ std::unique_ptr<ArcAppListPrefs::PackageInfo> ArcAppListPrefs::GetPackage(
 }
 
 std::vector<std::string> ArcAppListPrefs::GetAppIds() const {
-  if (!IsArcEnabled()) {
+  if (!IsPersistentArc() && !IsArcEnabled()) {
     // Default ARC apps available before OptIn.
     std::vector<std::string> ids;
     for (const auto& default_app : default_apps_.app_map()) {
@@ -431,7 +437,6 @@ std::vector<std::string> ArcAppListPrefs::GetAppIds() const {
 
 std::vector<std::string> ArcAppListPrefs::GetAppIdsNoArcEnabledCheck() const {
   std::vector<std::string> ids;
-
   const base::DictionaryValue* apps = prefs_->GetDictionary(prefs::kArcApps);
   DCHECK(apps);
 
@@ -595,7 +600,9 @@ void ArcAppListPrefs::RemoveAllApps() {
 void ArcAppListPrefs::OnArcPlayStoreEnabledChanged(bool enabled) {
   UpdateDefaultAppsHiddenState();
 
-  if (enabled)
+  // TODO(victorhsieh): refactor the logic.  For Persistent ARC, we need to
+  // collect apps whether or not the user is opted in to Play.
+  if (enabled || IsPersistentArc())
     NotifyRegisteredApps();
   else
     RemoveAllApps();