Enable login screen apps.

chrome/browser/extensions/external_provider_impl.cc

Index: chrome/browser/extensions/external_provider_impl.cc
diff --git a/chrome/browser/extensions/external_provider_impl.cc b/chrome/browser/extensions/external_provider_impl.cc
index 9d130940949ebedd0db51058603d2ca7b2a24129..a32630f4f79cedc83547d8961c29adcbd8ae5263 100644
--- a/chrome/browser/extensions/external_provider_impl.cc
+++ b/chrome/browser/extensions/external_provider_impl.cc
@@ -489,7 +489,21 @@ void ExternalProviderImpl::CreateExternalProviders(
   scoped_refptr<ExternalLoader> external_loader;
   scoped_refptr<ExternalLoader> external_recommended_loader;
   extensions::Manifest::Location crx_location = Manifest::INVALID_LOCATION;
+
 #if defined(OS_CHROMEOS)
+  if (chromeos::ProfileHelper::IsSigninProfile(profile)) {
+    // Download apps installed by policy in the login profile.
+    external_loader = new ExternalPolicyLoader(
+        ExtensionManagementFactory::GetForBrowserContext(profile),
+        ExternalPolicyLoader::FORCED);
+    provider_list->push_back(
+        linked_ptr<ExternalProviderInterface>(new ExternalProviderImpl(
+            service, external_loader, profile, crx_location,
+            Manifest::EXTERNAL_POLICY_DOWNLOAD,
+            Extension::FROM_WEBSTORE | Extension::WAS_INSTALLED_BY_DEFAULT)));
+    return;
+  }
+
   policy::BrowserPolicyConnectorChromeOS* connector =
       g_browser_process->platform_part()->browser_policy_connector_chromeos();
   bool is_chrome_os_public_session = false;