Oilpan: fix build after r191721 (b3a40c954).

Source/modules/permissions/PermissionController.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 PermissionController_h
 #define PermissionController_h
 
 #include "core/frame/FrameDestructionObserver.h"
 #include "platform/Supplementable.h"
 
 namespace blink {
 
 class WebPermissionClient;
 
 class PermissionController final
-    : public WillBeHeapSupplement<LocalFrame>
+    : public NoBaseWillBeGarbageCollectedFinalized<PermissionController>
+    , public WillBeHeapSupplement<LocalFrame>
     , public FrameDestructionObserver {
     WTF_MAKE_NONCOPYABLE(PermissionController);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PermissionController);
 public:
     virtual ~PermissionController();
 
     static void provideTo(LocalFrame&, WebPermissionClient*);
     static PermissionController* from(LocalFrame&);
     static const char* supplementName();
 
     WebPermissionClient* client() const;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     PermissionController(LocalFrame&, WebPermissionClient*);
 
     // Inherited from FrameDestructionObserver.
     virtual void willDetachFrameHost() override;
 
     WebPermissionClient* m_client;
 };
 
 } // namespace blink
 
 #endif // PermissionController_h