arc: Use GET_INTERFACE_FOR_METHOD macro

chrome/browser/chromeos/arc/video/gpu_arc_video_service_host.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/video/gpu_arc_video_service_host.h"
 
 #include <string>
 #include <utility>
 
 #include "base/location.h"
@@ skipping 54 matching lines @@
 }
 
 GpuArcVideoServiceHost::~GpuArcVideoServiceHost() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   arc_bridge_service()->video()->RemoveObserver(this);
 }
 
 void GpuArcVideoServiceHost::OnInstanceReady() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   auto* video_instance =
-      arc_bridge_service()->video()->GetInstanceForMethod("Init");
+      GET_INSTANCE_FOR_METHOD(arc_bridge_service()->video(), Init);
   DCHECK(video_instance);
   video_instance->Init(binding_.CreateInterfacePtrAndBind());
 }
 
 void GpuArcVideoServiceHost::DeprecatedOnRequestArcVideoAcceleratorChannel(
     const DeprecatedOnRequestArcVideoAcceleratorChannelCallback& callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   // Hardcode pid 0 since it is unused in mojo.
   const base::ProcessHandle kUnusedChildProcessHandle =
@@ skipping 62 matching lines @@
     return;
   }
   callback.Run(std::move(child_handle), token);
 
   mojo::MakeStrongBinding(base::MakeUnique<VideoAcceleratorFactoryService>(),
                           mojo::MakeRequest<mojom::VideoAcceleratorFactory>(
                               std::move(server_pipe)));
 }
 
 }  // namespace arc