Reland: [Oilpan] Move MediaStream{Source|Component|Descriptor} to Oilpan heap

third_party/WebKit/Source/platform/mediastream/MediaStreamComponent.h

 /*
  * Copyright (C) 2011 Ericsson AB. All rights reserved.
  * 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:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 15 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MediaStreamComponent_h
 #define MediaStreamComponent_h
 
 #include "platform/audio/AudioSourceProvider.h"
+#include "platform/heap/Handle.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/ThreadingPrimitives.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class MediaStreamSource;
 class WebAudioSourceProvider;
 
-class PLATFORM_EXPORT MediaStreamComponent final : public RefCounted<MediaStreamComponent> {
+class PLATFORM_EXPORT MediaStreamComponent final : public GarbageCollectedFinalized<MediaStreamComponent> {
 public:
     class ExtraData {
     public:
         virtual ~ExtraData() { }
     };
 
-    static PassRefPtr<MediaStreamComponent> create(PassRefPtr<MediaStreamSource>);
-    static PassRefPtr<MediaStreamComponent> create(const String& id, PassRefPtr<MediaStreamSource>);
+    static MediaStreamComponent* create(MediaStreamSource*);
+    static MediaStreamComponent* create(const String& id, MediaStreamSource*);
 
     MediaStreamSource* source() const { return m_source.get(); }
 
     String id() const { return m_id; }
     bool enabled() const { return m_enabled; }
     void setEnabled(bool enabled) { m_enabled = enabled; }
     bool muted() const { return m_muted; }
     void setMuted(bool muted) { m_muted = muted; }
 
 #if ENABLE(WEB_AUDIO)
     AudioSourceProvider* audioSourceProvider() { return &m_sourceProvider; }
     void setSourceProvider(WebAudioSourceProvider* provider) { m_sourceProvider.wrap(provider); }
 #endif // ENABLE(WEB_AUDIO)
 
     ExtraData* extraData() const { return m_extraData.get(); }
     void setExtraData(PassOwnPtr<ExtraData> extraData) { m_extraData = extraData; }
 
+    // |m_extraData| may hold pointers GC objects, and it may touch them in destruction.
+    // So this class is eagerly finalized to finalize |m_extraData| promptly.
+    EAGERLY_FINALIZE();
+    DECLARE_TRACE();
+
 private:
-    MediaStreamComponent(const String& id, PassRefPtr<MediaStreamSource>);
+    MediaStreamComponent(const String& id, MediaStreamSource*);
 
 #if ENABLE(WEB_AUDIO)
     // AudioSourceProviderImpl wraps a WebAudioSourceProvider::provideInput()
     // calls into chromium to get a rendered audio stream.
 
     class PLATFORM_EXPORT AudioSourceProviderImpl final: public AudioSourceProvider {
     public:
         AudioSourceProviderImpl()
             : m_webAudioSourceProvider(0)
         {
         }
 
         ~AudioSourceProviderImpl() override {}
 
         // Wraps the given blink::WebAudioSourceProvider to blink::AudioSourceProvider.
         void wrap(WebAudioSourceProvider*);
 
         // blink::AudioSourceProvider
         void provideInput(AudioBus*, size_t framesToProcess) override;
 
     private:
         WebAudioSourceProvider* m_webAudioSourceProvider;
         Mutex m_provideInputLock;
     };
 
     AudioSourceProviderImpl m_sourceProvider;
 #endif // ENABLE(WEB_AUDIO)
 
-    RefPtr<MediaStreamSource> m_source;
+    Member<MediaStreamSource> m_source;
     String m_id;
     bool m_enabled;
     bool m_muted;
     OwnPtr<ExtraData> m_extraData;
 };
 
-typedef Vector<RefPtr<MediaStreamComponent>> MediaStreamComponentVector;
+typedef HeapVector<Member<MediaStreamComponent>> MediaStreamComponentVector;
 
 } // namespace blink
 
 #endif // MediaStreamComponent_h