arc: Use GET_INTERFACE_FOR_METHOD macro

components/arc/obb_mounter/arc_obb_mounter_bridge.cc

Index: components/arc/obb_mounter/arc_obb_mounter_bridge.cc
diff --git a/components/arc/obb_mounter/arc_obb_mounter_bridge.cc b/components/arc/obb_mounter/arc_obb_mounter_bridge.cc
index dc160a46b1630219efba27a9f3ca4f65ccc2fb7b..54fc0af9d075b1ee881ade04bc6c5614eaeadf60 100644
--- a/components/arc/obb_mounter/arc_obb_mounter_bridge.cc
+++ b/components/arc/obb_mounter/arc_obb_mounter_bridge.cc
@@ -32,7 +32,7 @@ ArcObbMounterBridge::~ArcObbMounterBridge() {
 
 void ArcObbMounterBridge::OnInstanceReady() {
   mojom::ObbMounterInstance* obb_mounter_instance =
-      arc_bridge_service()->obb_mounter()->GetInstanceForMethod("Init");
+      ARC_GET_INSTANCE_FOR_METHOD(arc_bridge_service()->obb_mounter(), Init);
   DCHECK(obb_mounter_instance);
   obb_mounter_instance->Init(binding_.CreateInterfacePtrAndBind());
 }