Implement 'will-change' parsing

Source/core/rendering/style/StyleRareNonInheritedData.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,
@@ skipping 87 matching lines @@
     , m_perspective(o.m_perspective)
     , m_perspectiveOriginX(o.m_perspectiveOriginX)
     , m_perspectiveOriginY(o.m_perspectiveOriginY)
     , lineClamp(o.lineClamp)
     , m_draggableRegionMode(o.m_draggableRegionMode)
     , m_deprecatedFlexibleBox(o.m_deprecatedFlexibleBox)
     , m_flexibleBox(o.m_flexibleBox)
     , m_marquee(o.m_marquee)
     , m_multiCol(o.m_multiCol)
     , m_transform(o.m_transform)
+    , m_willChange(o.m_willChange)
     , m_filter(o.m_filter)
     , m_grid(o.m_grid)
     , m_gridItem(o.m_gridItem)
     , m_content(o.m_content ? o.m_content->clone() : nullptr)
     , m_counterDirectives(o.m_counterDirectives ? clone(*o.m_counterDirectives) : nullptr)
     , m_boxShadow(o.m_boxShadow)
     , m_boxReflect(o.m_boxReflect)
     , m_animations(o.m_animations ? adoptPtr(new CSSAnimationDataList(*o.m_animations)) : nullptr)
     , m_transitions(o.m_transitions ? adoptPtr(new CSSAnimationDataList(*o.m_transitions)) : nullptr)
     , m_mask(o.m_mask)
@@ skipping 61 matching lines @@
         && m_perspective == o.m_perspective
         && m_perspectiveOriginX == o.m_perspectiveOriginX
         && m_perspectiveOriginY == o.m_perspectiveOriginY
         && lineClamp == o.lineClamp
         && m_draggableRegionMode == o.m_draggableRegionMode
         && m_deprecatedFlexibleBox == o.m_deprecatedFlexibleBox
         && m_flexibleBox == o.m_flexibleBox
         && m_marquee == o.m_marquee
         && m_multiCol == o.m_multiCol
         && m_transform == o.m_transform
+        && m_willChange == o.m_willChange
         && m_filter == o.m_filter
         && m_grid == o.m_grid
         && m_gridItem == o.m_gridItem
         && contentDataEquivalent(o)
         && counterDataEquivalent(o)
         && shadowDataEquivalent(o)
         && reflectionDataEquivalent(o)
         && animationDataEquivalent(o)
         && transitionDataEquivalent(o)
         && m_mask == o.m_mask
@@ skipping 106 matching lines @@
         return false;
     return true;
 }
 
 bool StyleRareNonInheritedData::hasFilters() const
 {
     return m_filter.get() && !m_filter->m_operations.isEmpty();
 }
 
 } // namespace WebCore