MediaSource must use ref-counting to handle pending activity counting.

Source/modules/mediasource/MediaSource.h

 /*
  * Copyright (C) 2013 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 33 matching lines @@
 
 namespace blink {
 class WebSourceBuffer;
 }
 
 namespace WebCore {
 
 class ExceptionState;
 class GenericEventQueue;
 
+// FIXME: Oilpan: Change this to RefCountedGarbageCollectedWillBeGarbageCollectedFinalized
+// if MediaSource stops using ActiveDOMObject::setPendingActivity.
 class MediaSource FINAL
-    : public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<MediaSource>
+    : public RefCountedGarbageCollected<MediaSource>
     , public HTMLMediaSource
     , public ActiveDOMObject
     , public EventTargetWithInlineData
     , public ScriptWrappable {
-    DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<MediaSource>);
+    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedGarbageCollected<MediaSource>);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaSource);
 public:
     static const AtomicString& openKeyword();
     static const AtomicString& closedKeyword();
     static const AtomicString& endedKeyword();
 
     static MediaSource* create(ExecutionContext*);
     virtual ~MediaSource();
 
     // MediaSource.idl methods
@@ skipping 51 matching lines @@
     void endOfStreamInternal(const blink::WebMediaSource::EndOfStreamStatus, ExceptionState&);
 
     // Implements the duration change algorithm.
     // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#duration-change-algorithm
     void durationChangeAlgorithm(double newDuration);
 
     OwnPtr<blink::WebMediaSource> m_webMediaSource;
     AtomicString m_readyState;
     OwnPtrWillBeMember<GenericEventQueue> m_asyncEventQueue;
     // FIXME: oilpan: This should become a Member. For now, m_attachedElement will be cleared by the HTMLMediaElement destructor.
     HTMLMediaElement* m_attachedElement;

[haraken, 2014/07/01 16:20:59]

You might want to address this FIXME when you make
HTMLMediaElement::m_mediaSource a Member :)

[sof, 2014/07/01 16:22:41]

I'm just green'ing the tree, for now.

 
     Member<SourceBufferList> m_sourceBuffers;
     Member<SourceBufferList> m_activeSourceBuffers;
 };
 
 } // namespace WebCore
 
 #endif