Move markerlists to Oilpan heap and remove finalizer from DocumentMarkerController

Source/core/dom/DocumentMarker.h

Index: Source/core/dom/DocumentMarker.h
diff --git a/Source/core/dom/DocumentMarker.h b/Source/core/dom/DocumentMarker.h
index ded6b9d1c79cfc8474e51c108340494c53f3964f..fa30af325e3b0a6ca0621886dfd2184490226d9c 100644
--- a/Source/core/dom/DocumentMarker.h
+++ b/Source/core/dom/DocumentMarker.h
@@ -26,6 +26,7 @@
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
+#include "wtf/VectorTraits.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
@@ -152,4 +153,11 @@ public:
 
 } // namespace WebCore
 
+namespace WTF {
+
+template<>
+struct VectorTraits<WebCore::DocumentMarker> : SimpleClassVectorTraits<WebCore::DocumentMarker> { };
+
+} // namespace WTF
+
 #endif // DocumentMarker_h