Enable fetching of admin policies for login screen apps

chrome/browser/extensions/api/storage/managed_value_store_cache.cc

Index: chrome/browser/extensions/api/storage/managed_value_store_cache.cc
diff --git a/chrome/browser/extensions/api/storage/managed_value_store_cache.cc b/chrome/browser/extensions/api/storage/managed_value_store_cache.cc
index 1497d9f70933a3fb8510aab46377ea300a407a0a..2864c75d6bf53a25abeb005bb843e68de0ec6d2d 100644
--- a/chrome/browser/extensions/api/storage/managed_value_store_cache.cc
+++ b/chrome/browser/extensions/api/storage/managed_value_store_cache.cc
@@ -39,6 +39,10 @@
 #include "extensions/common/manifest_constants.h"
 #include "extensions/common/one_shot_event.h"
 
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/profiles/profile_helper.h"
+#endif
+
 using content::BrowserContext;
 using content::BrowserThread;
 
@@ -238,7 +242,7 @@ ManagedValueStoreCache::ManagedValueStoreCache(
     const scoped_refptr<ValueStoreFactory>& factory,
     const scoped_refptr<SettingsObserverList>& observers)
     : profile_(Profile::FromBrowserContext(context)),
-      policy_domain_(policy::POLICY_DOMAIN_EXTENSIONS),
+      policy_domain_(GetPolicyDomain(profile_)),
       policy_service_(
           policy::ProfilePolicyConnectorFactory::GetForBrowserContext(context)
               ->policy_service()),
@@ -331,6 +335,17 @@ void ManagedValueStoreCache::OnPolicyUpdated(const policy::PolicyNamespace& ns,
                  base::Passed(current.DeepCopy())));
 }
 
+// static
+policy::PolicyDomain ManagedValueStoreCache::GetPolicyDomain(Profile* profile) {
+#if defined(OS_CHROMEOS)
+  return chromeos::ProfileHelper::IsSigninProfile(profile)
+             ? policy::POLICY_DOMAIN_SIGNIN_EXTENSIONS
+             : policy::POLICY_DOMAIN_EXTENSIONS;
+#else
+  return policy::POLICY_DOMAIN_EXTENSIONS;
+#endif
+}
+
 void ManagedValueStoreCache::UpdatePolicyOnFILE(
     const std::string& extension_id,
     std::unique_ptr<policy::PolicyMap> current_policy) {