arc: Use GET_INTERFACE_FOR_METHOD macro

chrome/browser/chromeos/arc/process/arc_process_service.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.
 //
 // The main point of this class is to cache ARC proc nspid<->pid mapping
 // globally. Since the calculation is costly, a dedicated worker thread is
 // used. All read/write of its internal data structure (i.e., the mapping)
 // should be on this thread.
 
 #include "chrome/browser/chromeos/arc/process/arc_process_service.h"
@@ skipping 229 matching lines @@
     RequestProcessListCallback callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   // Since several services call this class to get information about the ARC
   // process list, it can produce a lot of logspam when the board is ARC-ready
   // but the user has not opted into ARC. This redundant check avoids that
   // logspam.
   if (!instance_ready_)
     return false;
 
-  mojom::ProcessInstance* process_instance =
-      arc_bridge_service()->process()->GetInstanceForMethod(
-          "RequestProcessList");
+  mojom::ProcessInstance* process_instance = GET_INSTANCE_FOR_METHOD(
+      arc_bridge_service()->process(), RequestProcessList);
   if (!process_instance)
     return false;
 
   process_instance->RequestProcessList(
       base::Bind(&ArcProcessService::OnReceiveProcessList,
                  weak_ptr_factory_.GetWeakPtr(), callback));
   return true;
 }
 
 void ArcProcessService::OnReceiveProcessList(
@@ skipping 21 matching lines @@
 void ArcProcessService::OnInstanceClosed() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   instance_ready_ = false;
 }
 
 inline ArcProcessService::NSPidToPidMap::NSPidToPidMap() {}
 
 inline ArcProcessService::NSPidToPidMap::~NSPidToPidMap() {}
 
 }  // namespace arc