Oilpan: add transition types to track interface objects.

Source/core/html/track/LoadableTextTrack.cpp

Index: Source/core/html/track/LoadableTextTrack.cpp
diff --git a/Source/core/html/track/LoadableTextTrack.cpp b/Source/core/html/track/LoadableTextTrack.cpp
index 66e6b8dcb9778bc87526cfdd89fb5cbc753c020b..7af955acc9fba1923ec5c9b04202bac107b6c3d8 100644
--- a/Source/core/html/track/LoadableTextTrack.cpp
+++ b/Source/core/html/track/LoadableTextTrack.cpp
@@ -111,7 +111,7 @@ void LoadableTextTrack::newCuesAvailable(TextTrackLoader* loader)
 {
     ASSERT_UNUSED(loader, m_loader == loader);
 
-    Vector<RefPtr<VTTCue> > newCues;
+    WillBeHeapVector<RefPtrWillBeMember<VTTCue> > newCues;
     m_loader->getNewCues(newCues);
 
     if (!m_cues)
@@ -119,7 +119,7 @@ void LoadableTextTrack::newCuesAvailable(TextTrackLoader* loader)
 
     for (size_t i = 0; i < newCues.size(); ++i) {
         newCues[i]->setTrack(this);
-        m_cues->add(newCues[i]);
+        m_cues->add(newCues[i].release());
     }
 
     if (mediaElement())
@@ -140,7 +140,7 @@ void LoadableTextTrack::newRegionsAvailable(TextTrackLoader* loader)
 {
     ASSERT_UNUSED(loader, m_loader == loader);
 
-    Vector<RefPtr<VTTRegion> > newRegions;
+    WillBeHeapVector<RefPtrWillBeMember<VTTRegion> > newRegions;
     m_loader->getNewRegions(newRegions);
 
     for (size_t i = 0; i < newRegions.size(); ++i) {
@@ -167,4 +167,10 @@ size_t LoadableTextTrack::trackElementIndex()
     return 0;
 }
 
+void LoadableTextTrack::trace(Visitor* visitor)
+{
+    visitor->trace(m_loader);
+    TextTrack::trace(visitor);
+}
+
 } // namespace WebCore