ResizeObserver pt4: IDL methods

third_party/WebKit/Source/core/observer/ResizeObserverEntry.h

 // Copyright 2016 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 ResizeObserverEntry_h
 #define ResizeObserverEntry_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class Element;
-class DOMRectReadOnly;
 class ClientRect;
 class LayoutSize;
 
 class ResizeObserverEntry final : public GarbageCollected<ResizeObserverEntry>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 
 public:
     explicit ResizeObserverEntry(Element* target);
 
     Element* target() const { return m_target; }
     // FIXME(atotic): should return DOMRectReadOnly once https://crbug.com/388780 lands
     ClientRect* contentRect() const { return m_contentRect; }
+    LayoutSize contentSize() const;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     Member<Element> m_target;
     Member<ClientRect>  m_contentRect;
 };
 
 } // namespace blink
 
 #endif // ResizeObserverEntry_h