Adding owner access from WebMediaStreamTrack::ExtraData

Source/core/platform/chromium/support/WebMediaStreamTrack.cpp

 /*
  * 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.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 34 matching lines @@
     explicit ExtraDataContainer(PassOwnPtr<WebMediaStreamTrack::ExtraData> extraData) : m_extraData(extraData) { }
 
     WebMediaStreamTrack::ExtraData* extraData() { return m_extraData.get(); }
 
 private:
     OwnPtr<WebMediaStreamTrack::ExtraData> m_extraData;
 };
 
 } // namespace
 
+WebMediaStreamTrack WebMediaStreamTrack::ExtraData::owner()
+{
+    ASSERT(m_owner);
+    return WebMediaStreamTrack(m_owner);
+}
+
+void WebMediaStreamTrack::ExtraData::setOwner(WebCore::MediaStreamComponent* owner)
+{
+    ASSERT(!m_owner);
+    m_owner = owner;
+}
+
 WebMediaStreamTrack::WebMediaStreamTrack(PassRefPtr<WebCore::MediaStreamComponent> mediaStreamComponent)
     : m_private(mediaStreamComponent)
 {
 }
 
 WebMediaStreamTrack::WebMediaStreamTrack(WebCore::MediaStreamComponent* mediaStreamComponent)
     : m_private(mediaStreamComponent)
 {
 }
 
@@ skipping 55 matching lines @@
 WebMediaStreamTrack::ExtraData* WebMediaStreamTrack::extraData() const
 {
     RefPtr<MediaStreamComponent::ExtraData> data = m_private->extraData();
     if (!data)
         return 0;
     return static_cast<ExtraDataContainer*>(data.get())->extraData();
 }
 
 void WebMediaStreamTrack::setExtraData(ExtraData* extraData)
 {
+    ASSERT(!m_private.isNull());
+
+    if (extraData)
+        extraData->setOwner(m_private.get());
+
     m_private->setExtraData(adoptRef(new ExtraDataContainer(adoptPtr(extraData))));
 }
 
 void WebMediaStreamTrack::setSourceProvider(WebAudioSourceProvider* provider)
 {
 #if ENABLE(WEB_AUDIO)
     ASSERT(!m_private.isNull());
     m_private->setSourceProvider(provider);
 #endif // ENABLE(WEB_AUDIO)
 }
 
 void WebMediaStreamTrack::assign(const WebMediaStreamTrack& other)
 {
     m_private = other.m_private;
 }
 
 } // namespace blink