include RefCounted.h where needed, only.

third_party/WebKit/Source/core/timing/PerformanceBase.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 20 matching lines @@
 
 #ifndef PerformanceBase_h
 #define PerformanceBase_h
 
 #include "core/CoreExport.h"
 #include "core/dom/DOMHighResTimeStamp.h"
 #include "core/events/EventTarget.h"
 #include "core/timing/PerformanceEntry.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
-#include "wtf/text/WTFString.h"
+#include "wtf/Forward.h"
+#include "wtf/HashSet.h"
+#include "wtf/ListHashSet.h"
+#include "wtf/Vector.h"
 
 namespace blink {
 
 class Document;
 class ExceptionState;
 class PerformanceObserver;
 class PerformanceTiming;
 class ResourceTimingInfo;
 class UserTiming;
 
@@ skipping 50 matching lines @@
 
     void unregisterPerformanceObserver(PerformanceObserver&);
     void registerPerformanceObserver(PerformanceObserver&);
     void updatePerformanceObserverFilterOptions();
     void activateObserver(PerformanceObserver&);
     void resumeSuspendedObservers();
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
+    explicit PerformanceBase(double timeOrigin);
 
-    explicit PerformanceBase(double timeOrigin);
     bool isResourceTimingBufferFull();
     void addResourceTimingBuffer(PerformanceEntry&);
 
     bool isFrameTimingBufferFull();
     void addFrameTimingBuffer(PerformanceEntry&);
 
     void notifyObserversOfEntry(PerformanceEntry&);
     bool hasObserverFor(PerformanceEntry::EntryType);
 
     void deliverObservationsTimerFired(Timer<PerformanceBase>*);
 
     PerformanceEntryVector m_frameTimingBuffer;
     unsigned m_frameTimingBufferSize;
     PerformanceEntryVector m_resourceTimingBuffer;
     unsigned m_resourceTimingBufferSize;
     double m_timeOrigin;
 
     Member<UserTiming> m_userTiming;
 
     PerformanceEntryTypeMask m_observerFilterOptions;
     PerformanceObservers m_observers;
     PerformanceObservers m_activeObservers;
     PerformanceObservers m_suspendedObservers;
     Timer<PerformanceBase> m_deliverObservationsTimer;
 };
 
 } // namespace blink
 
 #endif // PerformanceBase_h