Refactor lifetime management of UserMediaController

third_party/WebKit/Source/web/UserMediaClientImpl.h

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 26 matching lines @@
 namespace blink {
 
 class MediaDevices;
 class MediaDevicesRequest;
 class UserMediaRequest;
 class WebUserMediaClient;
 class WebLocalFrameImpl;
 
 class UserMediaClientImpl final : public UserMediaClient {
 public:
-    explicit UserMediaClientImpl(WebLocalFrameImpl*);
+    static std::unique_ptr<UserMediaClientImpl> create(WebUserMediaClient* client)
+    {
+        return wrapUnique(new UserMediaClientImpl(client));
+    }
 
     // UserMediaClient ----------------------------------------------
     void requestUserMedia(UserMediaRequest*) override;
     void cancelUserMediaRequest(UserMediaRequest*) override;
     void requestMediaDevices(MediaDevicesRequest*) override;
     void cancelMediaDevicesRequest(MediaDevicesRequest*) override;
     void requestSources(MediaStreamTrackSourcesRequest*) override;
     void setMediaDeviceChangeObserver(MediaDevices*) override;
 private:
-    UserMediaClientImpl();
+    explicit UserMediaClientImpl(WebUserMediaClient*);
 
     WebUserMediaClient* m_client;
 };
 
 } // namespace blink
 
 #endif // UserMediaClientImpl_h