[WIP] do something :-)

Source/core/style/FillLayer.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #include "config.h"
 #include "core/style/FillLayer.h"
 
 #include "core/style/DataEquivalency.h"
+#include "wtf/SizeAssertions.h"
 
 namespace blink {
 
-struct SameSizeAsFillLayer {
-    FillLayer* m_next;
-
-    RefPtrWillBePersistent<StyleImage> m_image;
-
-    Length m_xPosition;
-    Length m_yPosition;
-
-    LengthSize m_sizeLength;
-
-    unsigned m_bitfields1;
-    unsigned m_bitfields2;
-};
-
-static_assert(sizeof(FillLayer) == sizeof(SameSizeAsFillLayer), "FillLayer should stay small");
+ASSERT_SIZE(FillLayer, 48, 56);
 
 FillLayer::FillLayer(EFillLayerType type, bool useInitialValues)
     : m_next(0)
     , m_image(FillLayer::initialFillImage(type))
     , m_xPosition(FillLayer::initialFillXPosition(type))
     , m_yPosition(FillLayer::initialFillYPosition(type))
     , m_sizeLength(FillLayer::initialFillSizeLength(type))
     , m_attachment(FillLayer::initialFillAttachment(type))
     , m_clip(FillLayer::initialFillClip(type))
     , m_origin(FillLayer::initialFillOrigin(type))
@@ skipping 334 matching lines @@
 
     return false;
 }
 
 bool FillLayer::hasRepeatXY() const
 {
     return m_repeatX == RepeatFill && m_repeatY == RepeatFill;
 }
 
 } // namespace blink