arc: Use GET_INTERFACE_FOR_METHOD macro

components/arc/power/arc_power_bridge.cc

Index: components/arc/power/arc_power_bridge.cc
diff --git a/components/arc/power/arc_power_bridge.cc b/components/arc/power/arc_power_bridge.cc
index c49d0b5fc4649a4cc98f05bee39fc05e646d71c0..21b02e0ebfe7457cbc92d76995e41790586b75f4 100644
--- a/components/arc/power/arc_power_bridge.cc
+++ b/components/arc/power/arc_power_bridge.cc
@@ -15,12 +15,6 @@
 
 namespace arc {
 
-namespace {
-
-constexpr uint32_t kMinVersionForSetInteractive = 1;
-
-}  // namespace
-
 ArcPowerBridge::ArcPowerBridge(ArcBridgeService* bridge_service)
     : ArcService(bridge_service), binding_(this) {
   arc_bridge_service()->power()->AddObserver(this);
@@ -33,7 +27,7 @@ ArcPowerBridge::~ArcPowerBridge() {
 
 void ArcPowerBridge::OnInstanceReady() {
   mojom::PowerInstance* power_instance =
-      arc_bridge_service()->power()->GetInstanceForMethod("Init");
+      GET_INSTANCE_FOR_METHOD(arc_bridge_service()->power(), Init);
   DCHECK(power_instance);
   power_instance->Init(binding_.CreateInterfacePtrAndBind());
   ash::Shell::GetInstance()->display_configurator()->AddObserver(this);
@@ -47,8 +41,7 @@ void ArcPowerBridge::OnInstanceClosed() {
 void ArcPowerBridge::OnPowerStateChanged(
     chromeos::DisplayPowerState power_state) {
   mojom::PowerInstance* power_instance =
-      arc_bridge_service()->power()->GetInstanceForMethod(
-          "SetInteractive", kMinVersionForSetInteractive);
+      GET_INSTANCE_FOR_METHOD(arc_bridge_service()->power(), SetInteractive);
   if (!power_instance)
     return;