Oilpan: Remove unused destructor from non-finalized SharedWorkerPerformance.

Source/modules/performance/SharedWorkerPerformance.cpp

 /*
  * Copyright (c) 2014, Opera Software ASA. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 #include "core/loader/DocumentLoader.h"
 #include "core/workers/SharedWorker.h"
 
 namespace WebCore {
 
 SharedWorkerPerformance::SharedWorkerPerformance()
     : m_timeOrigin(monotonicallyIncreasingTime())
 {
 }
 
-SharedWorkerPerformance::~SharedWorkerPerformance()
-{
-}
-
 const char* SharedWorkerPerformance::supplementName()
 {
     return "SharedWorkerPerformance";
 }
 
 SharedWorkerPerformance& SharedWorkerPerformance::from(SharedWorker& sharedWorker)
 {
     SharedWorkerPerformance* supplement = static_cast<SharedWorkerPerformance*>(WillBeHeapSupplement<SharedWorker>::from(sharedWorker, supplementName()));
     if (!supplement) {
         supplement = new SharedWorkerPerformance();
@@ skipping 14 matching lines @@
     Document* document = toDocument(context);
     if (!document->loader())
         return 0;
 
     double navigationStart = document->loader()->timing()->navigationStart();
     return m_timeOrigin - navigationStart;
 }
 
 } // namespace WebCore