Oilpan: Enable oilpan for callback classes

Source/modules/notifications/NotificationPermissionClient.h

 // Copyright 2014 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 NotificationPermissionClient_h
 #define NotificationPermissionClient_h
 
 #include "modules/notifications/NotificationPermissionCallback.h"
 #include "platform/Supplementable.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 class ExecutionContext;
 class LocalFrame;
 
 class NotificationPermissionClient : public WillBeHeapSupplement<LocalFrame> {
 public:
     virtual ~NotificationPermissionClient() { }
 
     // Requests user permission to show platform notifications from the origin
     // of the current frame. The provided callback will be ran when the user
     // has made a decision.
-    virtual void requestPermission(ExecutionContext*, PassOwnPtrWillBeRawPtr<NotificationPermissionCallback>) = 0;
+    virtual void requestPermission(ExecutionContext*, NotificationPermissionCallback*) = 0;
 
     // WillBeHeapSupplement requirements.
     static const char* supplementName();
     static NotificationPermissionClient* from(ExecutionContext*);
 };
 
 void provideNotificationPermissionClientTo(LocalFrame&, PassOwnPtrWillBeRawPtr<NotificationPermissionClient>);
 
 } // namespace blink
 
 #endif // NotificationPermissionClient_h