Oilpan: have Navigator and its supplements be on the heap by default.

Source/modules/donottrack/NavigatorDoNotTrack.h

Index: Source/modules/donottrack/NavigatorDoNotTrack.h
diff --git a/Source/modules/donottrack/NavigatorDoNotTrack.h b/Source/modules/donottrack/NavigatorDoNotTrack.h
index 30b631b32b28c8e3bb84593ce27f6e2b99e21e03..cf88850850686306c3cb04f244e6d5d2b3cffa8e 100644
--- a/Source/modules/donottrack/NavigatorDoNotTrack.h
+++ b/Source/modules/donottrack/NavigatorDoNotTrack.h
@@ -41,11 +41,12 @@ namespace blink {
 class LocalFrame;
 class Navigator;
 
-class NavigatorDoNotTrack final : public NoBaseWillBeGarbageCollected<NavigatorDoNotTrack>, public WillBeHeapSupplement<Navigator>, public DOMWindowProperty {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(NavigatorDoNotTrack);
-    DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(NavigatorDoNotTrack);
+// TODO(Oilpan): when ~DOMWindowProperty is removed, derive from GarbageCollected<> instead.
+class NavigatorDoNotTrack final : public GarbageCollectedFinalized<NavigatorDoNotTrack>, public HeapSupplement<Navigator>, DOMWindowProperty {
+    USING_GARBAGE_COLLECTED_MIXIN(NavigatorDoNotTrack);
 public:
     static NavigatorDoNotTrack& from(Navigator&);
+    virtual ~NavigatorDoNotTrack();
 
     static String doNotTrack(Navigator&);