Supplement should have a Member to the corresponding Supplementable object (Part 1)

third_party/WebKit/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/CoreExport.h"
 #include "core/frame/DOMWindowProperty.h"
+#include "core/frame/LocalDOMWindow.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
 class DOMWindow;
 class Performance;
 
 class CORE_EXPORT DOMWindowPerformance final : public GarbageCollected<DOMWindowPerformance>, public Supplement<LocalDOMWindow>, public DOMWindowProperty {
@@ skipping 12 matching lines @@
     Performance* performance();
 
     // TODO(sof): try to move this direct reference and instead rely on frame().
     Member<LocalDOMWindow> m_window;
     Member<Performance> m_performance;
 };
 
 } // namespace blink
 
 #endif // DOMWindowPerformance_h