Always use arc::InstanceHolder<T>::GetInstanceForMethod

chrome/browser/chromeos/arc/arc_print_service.cc

Index: chrome/browser/chromeos/arc/arc_print_service.cc
diff --git a/chrome/browser/chromeos/arc/arc_print_service.cc b/chrome/browser/chromeos/arc/arc_print_service.cc
index 28de889953839e35bfa71d53f4c6f3f8dde43fe8..f1b3c446a8a3136a94a1581cc4a602f503781ce5 100644
--- a/chrome/browser/chromeos/arc/arc_print_service.cc
+++ b/chrome/browser/chromeos/arc/arc_print_service.cc
@@ -67,12 +67,8 @@ ArcPrintService::~ArcPrintService() {
 
 void ArcPrintService::OnInstanceReady() {
   mojom::PrintInstance* print_instance =
-      arc_bridge_service()->print()->instance();
-  if (!print_instance) {
-    LOG(ERROR) << "OnPrintInstanceReady called, but no print instance found";
-    return;
-  }
-
+      arc_bridge_service()->print()->GetInstanceForMethod("Init");
+  DCHECK(print_instance);
   print_instance->Init(binding_.CreateInterfacePtrAndBind());
 }