Remove unnecessary uses of GarbageCollectedFinalized<>.

third_party/WebKit/Source/core/timing/PerformanceObserver.cpp

 // 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.
 
 #include "core/timing/PerformanceObserver.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/timing/PerformanceBase.h"
 #include "core/timing/PerformanceEntry.h"
@@ skipping 12 matching lines @@
 }
 
 PerformanceObserver::PerformanceObserver(PerformanceBase* performance, PerformanceObserverCallback* callback)
     : m_callback(callback)
     , m_performance(performance)
     , m_filterOptions(PerformanceEntry::Invalid)
     , m_isRegistered(false)
 {
 }
 
-PerformanceObserver::~PerformanceObserver()
-{
-}
-
 void PerformanceObserver::observe(const PerformanceObserverInit& observerInit, ExceptionState& exceptionState)
 {
     if (!m_performance) {
         exceptionState.throwTypeError("Window may be destroyed? Performance target is invalid.");
         return;
     }
 
     PerformanceEntryTypeMask entryTypes = PerformanceEntry::Invalid;
     if (observerInit.hasEntryTypes() && observerInit.entryTypes().size()) {
         const Vector<String>& sequence = observerInit.entryTypes();
@@ skipping 48 matching lines @@
 }
 
 DEFINE_TRACE(PerformanceObserver)
 {
     visitor->trace(m_callback);
     visitor->trace(m_performance);
     visitor->trace(m_performanceEntries);
 }
 
 } // namespace blink