arc: Use GET_INTERFACE_FOR_METHOD macro

chrome/browser/chromeos/arc/policy/arc_policy_bridge.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 "chrome/browser/chromeos/arc/policy/arc_policy_bridge.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/json/json_reader.h"
@@ skipping 267 matching lines @@
 }
 
 void ArcPolicyBridge::OnInstanceReady() {
   VLOG(1) << "ArcPolicyBridge::OnPolicyInstanceReady";
   if (policy_service_ == nullptr) {
     InitializePolicyService();
   }
   policy_service_->AddObserver(policy::POLICY_DOMAIN_CHROME, this);
 
   mojom::PolicyInstance* const policy_instance =
-      arc_bridge_service()->policy()->GetInstanceForMethod("Init");
+      GET_INSTANCE_FOR_METHOD(arc_bridge_service()->policy(), Init);
   DCHECK(policy_instance);
   policy_instance->Init(binding_.CreateInterfacePtrAndBind());
 }
 
 void ArcPolicyBridge::OnInstanceClosed() {
   VLOG(1) << "ArcPolicyBridge::OnPolicyInstanceClosed";
   policy_service_->RemoveObserver(policy::POLICY_DOMAIN_CHROME, this);
   policy_service_ = nullptr;
 }
 
@@ skipping 62 matching lines @@
   safe_json::SafeJsonParser::Parse(
       request, base::Bind(&OnReportComplianceParseSuccess, callback),
       base::Bind(&OnReportComplianceParseFailure, callback));
 }
 
 void ArcPolicyBridge::OnPolicyUpdated(const policy::PolicyNamespace& ns,
                                       const policy::PolicyMap& previous,
                                       const policy::PolicyMap& current) {
   VLOG(1) << "ArcPolicyBridge::OnPolicyUpdated";
   auto* instance =
-      arc_bridge_service()->policy()->GetInstanceForMethod("OnPolicyUpdated");
+      GET_INSTANCE_FOR_METHOD(arc_bridge_service()->policy(), OnPolicyUpdated);
   if (!instance)
     return;
   instance->OnPolicyUpdated();
 }
 
 void ArcPolicyBridge::InitializePolicyService() {
   const user_manager::User* const primary_user =
       user_manager::UserManager::Get()->GetPrimaryUser();
   Profile* const profile =
       chromeos::ProfileHelper::Get()->GetProfileByUser(primary_user);
   auto* profile_policy_connector =
       policy::ProfilePolicyConnectorFactory::GetForBrowserContext(profile);
   policy_service_ = profile_policy_connector->policy_service();
   is_managed_ = profile_policy_connector->IsManaged();
 }
 
 }  // namespace arc