arc: Use GET_INTERFACE_FOR_METHOD macro

components/arc/storage_manager/arc_storage_manager.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/arc/storage_manager/arc_storage_manager.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "components/arc/arc_bridge_service.h"
 
 namespace arc {
 
 namespace {
 
-const int kMinInstanceVersion = 1;  // See storage_manager.mojom.
-
 // This class is owned by ArcServiceManager so that it is safe to use this raw
 // pointer as the singleton reference.
 ArcStorageManager* g_arc_storage_manager = nullptr;
 
 }  // namespace
 
 ArcStorageManager::ArcStorageManager(ArcBridgeService* bridge_service)
     : ArcService(bridge_service) {
   DCHECK(!g_arc_storage_manager);
   g_arc_storage_manager = this;
 }
 
 ArcStorageManager::~ArcStorageManager() {
   DCHECK_EQ(this, g_arc_storage_manager);
   g_arc_storage_manager = nullptr;
 }
 
 // static
 ArcStorageManager* ArcStorageManager::Get() {
   DCHECK(g_arc_storage_manager);
   return g_arc_storage_manager;
 }
 
 bool ArcStorageManager::OpenPrivateVolumeSettings() {
-  auto* storage_manager_instance =
-      arc_bridge_service()->storage_manager()->GetInstanceForMethod(
-          "OpenPrivateVolumeSettings", kMinInstanceVersion);
+  auto* storage_manager_instance = GET_INSTANCE_FOR_METHOD(
+      arc_bridge_service()->storage_manager(), OpenPrivateVolumeSettings);
   if (!storage_manager_instance)
     return false;
   storage_manager_instance->OpenPrivateVolumeSettings();
   return true;
 }
 
 bool ArcStorageManager::GetApplicationsSize(
     const GetApplicationsSizeCallback& callback) {
-  auto* storage_manager_instance =
-      arc_bridge_service()->storage_manager()->GetInstanceForMethod(
-          "GetApplicationsSize", kMinInstanceVersion);
+  auto* storage_manager_instance = GET_INSTANCE_FOR_METHOD(
+      arc_bridge_service()->storage_manager(), GetApplicationsSize);
   if (!storage_manager_instance)
     return false;
   storage_manager_instance->GetApplicationsSize(callback);
   return true;
 }
 
 bool ArcStorageManager::DeleteApplicationsCache(
     const base::Callback<void()>& callback) {
-  auto* storage_manager_instance =
-      arc_bridge_service()->storage_manager()->GetInstanceForMethod(
-          "DeleteApplicationsCache", kMinInstanceVersion);
+  auto* storage_manager_instance = GET_INSTANCE_FOR_METHOD(
+      arc_bridge_service()->storage_manager(), DeleteApplicationsCache);
   if (!storage_manager_instance)
     return false;
   storage_manager_instance->DeleteApplicationsCache(callback);
   return true;
 }
 
 }  // namespace arc