Implement 'will-change' parsing

Source/core/rendering/style/StyleRareNonInheritedData.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 39 matching lines @@
 class StyleDeprecatedFlexibleBoxData;
 class StyleFilterData;
 class StyleFlexibleBoxData;
 class StyleGridData;
 class StyleGridItemData;
 class StyleMarqueeData;
 class StyleMultiColData;
 class StyleReflection;
 class StyleResolver;
 class StyleTransformData;
+class StyleWillChangeData;
 
 // Page size type.
 // StyleRareNonInheritedData::m_pageSize is meaningful only when
 // StyleRareNonInheritedData::m_pageSizeType is PAGE_SIZE_RESOLVED.
 enum PageSizeType {
     PAGE_SIZE_AUTO, // size: auto
     PAGE_SIZE_AUTO_LANDSCAPE, // size: landscape
     PAGE_SIZE_AUTO_PORTRAIT, // size: portrait
     PAGE_SIZE_RESOLVED // Size is fully resolved.
 };
@@ skipping 29 matching lines @@
     Length m_perspectiveOriginY;
 
     LineClampValue lineClamp; // An Apple extension.
     DraggableRegionMode m_draggableRegionMode;
 
     DataRef<StyleDeprecatedFlexibleBoxData> m_deprecatedFlexibleBox; // Flexible box properties
     DataRef<StyleFlexibleBoxData> m_flexibleBox;
     DataRef<StyleMarqueeData> m_marquee; // Marquee properties
     DataRef<StyleMultiColData> m_multiCol; //  CSS3 multicol properties
     DataRef<StyleTransformData> m_transform; // Transform properties (rotate, scale, skew, etc.)
+    DataRef<StyleWillChangeData> m_willChange; // CSS Will Change
 
     DataRef<StyleFilterData> m_filter; // Filter operations (url, sepia, blur, etc.)
 
     DataRef<StyleGridData> m_grid;
     DataRef<StyleGridItemData> m_gridItem;
 
     OwnPtr<ContentData> m_content;
     OwnPtr<CounterDirectiveMap> m_counterDirectives;
 
     RefPtr<ShadowList> m_boxShadow;
@@ skipping 74 matching lines @@
     unsigned m_scrollBehavior: 2;
 
 private:
     StyleRareNonInheritedData();
     StyleRareNonInheritedData(const StyleRareNonInheritedData&);
 };
 
 } // namespace WebCore
 
 #endif // StyleRareNonInheritedData_h