Oilpan: Allocate all EventTarget derived types on the manged heap.

Source/core/html/MediaController.h

Index: Source/core/html/MediaController.h
diff --git a/Source/core/html/MediaController.h b/Source/core/html/MediaController.h
index 5536b68dfae48a5b3f752c128c0a7b341412b105..cba47eaa05bcf9ec396cabfd505e8525fd97627e 100644
--- a/Source/core/html/MediaController.h
+++ b/Source/core/html/MediaController.h
@@ -40,8 +40,9 @@ class ExceptionState;
 class ExecutionContext;
 class GenericEventQueue;
 
-class MediaController FINAL : public RefCounted<MediaController>, public ScriptWrappable, public EventTargetWithInlineData {
+class MediaController FINAL : public RefCountedWillBeRefCountedGarbageCollected<MediaController>, public ScriptWrappable, public EventTargetWithInlineData {
     REFCOUNTED_EVENT_TARGET(MediaController);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaController);
 public:
     static PassRefPtr<MediaController> create(ExecutionContext*);
     virtual ~MediaController();