[WIP] do something :-)

Source/core/layout/LayoutInline.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 24 matching lines @@
 #include "core/layout/api/LineLayoutBoxModel.h"
 #include "core/layout/line/InlineTextBox.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/DeprecatedPaintLayer.h"
 #include "core/paint/InlinePainter.h"
 #include "core/paint/ObjectPainter.h"
 #include "core/style/StyleInheritedData.h"
 #include "platform/geometry/FloatQuad.h"
 #include "platform/geometry/Region.h"
 #include "platform/geometry/TransformState.h"
+#include "wtf/SizeAssertions.h"
 
 namespace blink {
 
-struct SameSizeAsLayoutInline : public LayoutBoxModelObject {
-    virtual ~SameSizeAsLayoutInline() { }
-    LayoutObjectChildList m_children;
-    LineBoxList m_lineBoxes;
-};
-
-static_assert(sizeof(LayoutInline) == sizeof(SameSizeAsLayoutInline), "LayoutInline should stay small");
+ASSERT_SIZE(LayoutInline, sizeof(LayoutBoxModelObject) + 16, sizeof(LayoutBoxModelObject) + 32);
 
 LayoutInline::LayoutInline(Element* element)
     : LayoutBoxModelObject(element)
 {
     setChildrenInline(true);
 }
 
 LayoutInline* LayoutInline::createAnonymous(Document* document)
 {
     LayoutInline* layoutObject = new LayoutInline(nullptr);
@@ skipping 1350 matching lines @@
 }
 
 void LayoutInline::invalidateDisplayItemClients(const LayoutBoxModelObject& paintInvalidationContainer) const
 {
     LayoutBoxModelObject::invalidateDisplayItemClients(paintInvalidationContainer);
     for (InlineFlowBox* box = firstLineBox(); box; box = box->nextLineBox())
         paintInvalidationContainer.invalidateDisplayItemClientOnBacking(*box);
 }
 
 } // namespace blink