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

Source/modules/permissions/NavigatorPermissions.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NavigatorPermissions_h
 #define NavigatorPermissions_h
 
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class Navigator;
 class Permissions;
 
-class NavigatorPermissions final
-    : public NoBaseWillBeGarbageCollectedFinalized<NavigatorPermissions>
-    , public WillBeHeapSupplement<Navigator> {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(NavigatorPermissions);
+class NavigatorPermissions final : public GarbageCollected<NavigatorPermissions>, public HeapSupplement<Navigator> {
+    USING_GARBAGE_COLLECTED_MIXIN(NavigatorPermissions);
 public:
-    virtual ~NavigatorPermissions();
-
     static NavigatorPermissions& from(Navigator&);
     static Permissions* permissions(Navigator&);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
+    NavigatorPermissions();
+
     static const char* supplementName();
 
-    NavigatorPermissions();
-
-    PersistentWillBeMember<Permissions> m_permissions;
+    Member<Permissions> m_permissions;
 };
 
 } // namespace blink
 
 #endif // NavigatorPermissions_h