Always use arc::InstanceHolder<T>::GetInstanceForMethod

chrome/browser/chromeos/arc/arc_tts_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.
 
 #include "chrome/browser/chromeos/arc/arc_tts_service.h"
 
 #include "base/logging.h"
 #include "chrome/browser/speech/tts_controller.h"
 #include "components/arc/arc_bridge_service.h"
 
 namespace arc {
 
 ArcTtsService::ArcTtsService(ArcBridgeService* bridge_service)
     : ArcService(bridge_service), binding_(this) {
   arc_bridge_service()->tts()->AddObserver(this);
 }
 
 ArcTtsService::~ArcTtsService() {
   arc_bridge_service()->tts()->RemoveObserver(this);
 }
 
 void ArcTtsService::OnInstanceReady() {
-  mojom::TtsInstance* tts_instance = arc_bridge_service()->tts()->instance();
-  if (!tts_instance) {
-    LOG(ERROR) << "OnTtsInstanceReady called, "
-               << "but no tts instance found";
-    return;
-  }
+  mojom::TtsInstance* tts_instance =
+      arc_bridge_service()->tts()->GetInstanceForMethod("Init");
+  CHECK(tts_instance);
   tts_instance->Init(binding_.CreateInterfacePtrAndBind());
 }
 
 void ArcTtsService::OnTtsEvent(uint32_t id,
                                mojom::TtsEventType event_type,
                                uint32_t char_index,
                                const mojo::String& error_msg) {
   if (!TtsController::GetInstance())
     return;
 
@@ skipping 10 matching lines @@
       break;
     case mojom::TtsEventType::ERROR:
       chrome_event_type = TTS_EVENT_ERROR;
       break;
   }
   TtsController::GetInstance()->OnTtsEvent(id, chrome_event_type, char_index,
                                            error_msg);
 }
 
 }  // namespace arc