Create CanvasCaptureMediaStreamTrack in a regular MediaStream

third_party/WebKit/Source/modules/mediastream/MediaStreamTrack.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Ericsson AB. 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
@@ skipping 23 matching lines @@
 #include "platform/mediastream/MediaStreamSource.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class AudioSourceProvider;
 class ExceptionState;
 class MediaStreamComponent;
 class MediaStreamTrackSourcesCallback;
 
-class MODULES_EXPORT MediaStreamTrack final
+class MODULES_EXPORT MediaStreamTrack
     : public RefCountedGarbageCollectedEventTargetWithInlineData<MediaStreamTrack>
     , public ActiveDOMObject
     , public MediaStreamSource::Observer {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(MediaStreamTrack);
     USING_GARBAGE_COLLECTED_MIXIN(MediaStreamTrack);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static MediaStreamTrack* create(ExecutionContext*, MediaStreamComponent*);
     ~MediaStreamTrack() override;
 
@@ skipping 29 matching lines @@
     ExecutionContext* executionContext() const override;
 
     // ActiveDOMObject
     void stop() override;
 
     PassOwnPtr<AudioSourceProvider> createWebAudioSource();
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
+    friend class CanvasCaptureMediaStreamTrack;
+
     MediaStreamTrack(ExecutionContext*, MediaStreamComponent*);
 
     // MediaStreamSourceObserver
     void sourceChangedState() override;
 
     void propagateTrackEnded();
 
     MediaStreamSource::ReadyState m_readyState;
     HeapHashSet<Member<MediaStream>> m_registeredMediaStreams;
     bool m_isIteratingRegisteredMediaStreams;
     bool m_stopped;
     Member<MediaStreamComponent> m_component;
 };
 
 typedef HeapVector<Member<MediaStreamTrack>> MediaStreamTrackVector;
 
 } // namespace blink
 
 #endif // MediaStreamTrack_h