arc: Don't show default Arc apps for managed users with Arc-disabled.

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

Index: chrome/browser/ui/app_list/arc/arc_default_app_list.cc
diff --git a/chrome/browser/ui/app_list/arc/arc_default_app_list.cc b/chrome/browser/ui/app_list/arc/arc_default_app_list.cc
index 37d2e96a204dc8a9c4f0682f91589d1c965072a2..1e02251f5438afe5219508ae63607f117f176dd5 100644
--- a/chrome/browser/ui/app_list/arc/arc_default_app_list.cc
+++ b/chrome/browser/ui/app_list/arc/arc_default_app_list.cc
@@ -172,6 +172,8 @@ void ArcDefaultAppList::OnAppsReady(std::unique_ptr<AppInfoMap> apps) {
 
 const ArcDefaultAppList::AppInfo* ArcDefaultAppList::GetApp(
     const std::string& app_id) const {
+  if (hidden_)
+    return nullptr;
   const auto it = apps_.find(app_id);
   if (it == apps_.end())
     return nullptr;