InlinedVisitor: Migrate timing to use inlined tracing

Source/core/timing/DOMWindowPerformance.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 DOMWindowPerformance_h
 #define DOMWindowPerformance_h
 
 #include "core/frame/DOMWindowProperty.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class DOMWindow;
 class Performance;
 
 class DOMWindowPerformance final : public NoBaseWillBeGarbageCollected<DOMWindowPerformance>, public WillBeHeapSupplement<LocalDOMWindow>, public DOMWindowProperty {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMWindowPerformance);
     DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(DOMWindowPerformance);
 public:
     static DOMWindowPerformance& from(LocalDOMWindow&);
     static Performance* performance(DOMWindow&);
 
-    void trace(Visitor*);
+    DECLARE_TRACE();
 
 private:
     explicit DOMWindowPerformance(LocalDOMWindow&);
     static const char* supplementName();
 
     Performance* performance();
 
     LocalDOMWindow& m_window;
     RefPtrWillBeMember<Performance> m_performance;
 };
 
 } // namespace blink
 
 #endif // DOMWindowPerformance_h