Enable fetching of admin policies for login screen apps

components/policy/core/common/schema_registry.cc

Index: components/policy/core/common/schema_registry.cc
diff --git a/components/policy/core/common/schema_registry.cc b/components/policy/core/common/schema_registry.cc
index 6482962a51840786e31b19201331da324549932d..03580859d07cd5fc33c2d806f6efadb1261ee422 100644
--- a/components/policy/core/common/schema_registry.cc
+++ b/components/policy/core/common/schema_registry.cc
@@ -199,6 +199,7 @@ ForwardingSchemaRegistry::ForwardingSchemaRegistry(SchemaRegistry* wrapped)
   schema_map_ = wrapped_->schema_map();
   wrapped_->AddObserver(this);
   wrapped_->AddInternalObserver(this);
+  UpdateReadiness();
 }
 
 ForwardingSchemaRegistry::~ForwardingSchemaRegistry() {
@@ -230,6 +231,10 @@ void ForwardingSchemaRegistry::OnSchemaRegistryUpdated(bool has_new_schemas) {
   Notify(has_new_schemas);
 }
 
+void ForwardingSchemaRegistry::OnSchemaRegistryReady() {
+  UpdateReadiness();
+}
+
 void ForwardingSchemaRegistry::OnSchemaRegistryShuttingDown(
     SchemaRegistry* registry) {
   DCHECK_EQ(wrapped_, registry);
@@ -239,4 +244,9 @@ void ForwardingSchemaRegistry::OnSchemaRegistryShuttingDown(
   // Keep serving the same |schema_map_|.
 }
 
+void ForwardingSchemaRegistry::UpdateReadiness() {
+  if (wrapped_->IsReady())
+    SetAllDomainsReady();
+}
+
 }  // namespace policy