Refactor lifetime management of UserMediaController

third_party/WebKit/Source/modules/mediastream/UserMediaController.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 13 matching lines @@
 
 #include "modules/mediastream/UserMediaController.h"
 
 namespace blink {
 
 const char* UserMediaController::supplementName()
 {
     return "UserMediaController";
 }
 
-UserMediaController::UserMediaController(UserMediaClient* client)
-    : m_client(client)
+UserMediaController::UserMediaController(std::unique_ptr<UserMediaClient> client)
+    : m_client(std::move(client))
 {
 }
 
 DEFINE_TRACE(UserMediaController)
 {
     Supplement<LocalFrame>::trace(visitor);
 }
 
-UserMediaController* UserMediaController::create(UserMediaClient* client)
+UserMediaController* UserMediaController::create(std::unique_ptr<UserMediaClient> client)
 {
-    return new UserMediaController(client);
+    return new UserMediaController(std::move(client));
 }
 
-void provideUserMediaTo(LocalFrame& frame, UserMediaClient* client)
+void provideUserMediaTo(LocalFrame& frame, std::unique_ptr<UserMediaClient> client)
 {
-    UserMediaController::provideTo(frame, UserMediaController::supplementName(), UserMediaController::create(client));
+    UserMediaController::provideTo(frame, UserMediaController::supplementName(), UserMediaController::create(std::move(client)));
 }
 
 } // namespace blink