Enable login screen apps.

chrome/browser/extensions/extension_system_impl.cc

Index: chrome/browser/extensions/extension_system_impl.cc
diff --git a/chrome/browser/extensions/extension_system_impl.cc b/chrome/browser/extensions/extension_system_impl.cc
index 602711d7151d590ba44ee3bc32dad574322fe6b3..98b7bb06d45a706e5376f134d23af9d5dde56901 100644
--- a/chrome/browser/extensions/extension_system_impl.cc
+++ b/chrome/browser/extensions/extension_system_impl.cc
@@ -209,6 +209,11 @@ void ExtensionSystemImpl::Shared::Init(bool extensions_enabled) {
   bool autoupdate_enabled = !profile_->IsGuestSession() &&
                             !profile_->IsSystemProfile();
 #if defined(OS_CHROMEOS)
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableLoginScreenApps) &&
+      chromeos::ProfileHelper::IsSigninProfile(profile_)) {
+    extensions_enabled = true;

[Devlin, 2017/03/08 17:24:32]

I'd rather we instead update the call site to pass the proper value for
extensions_enabled here - it's confusing to have multiple places determine it.

[achuithb, 2017/03/09 14:31:05]

Done.

+  }
   if (!extensions_enabled)
     autoupdate_enabled = false;
 #endif  // defined(OS_CHROMEOS)