Remove dead code related to compositing from Sky

sky/engine/core/rendering/style/RenderStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Adobe Systems Incorporated. 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 474 matching lines @@
 {
     rareInheritedData.access()->quotes = q;
 }
 
 void RenderStyle::clearCursorList()
 {
     if (rareInheritedData->cursorData)
         rareInheritedData.access()->cursorData = nullptr;
 }
 
-bool RenderStyle::hasWillChangeCompositingHint() const
-{
-    for (size_t i = 0; i < rareNonInheritedData->m_willChange->m_properties.size(); ++i) {
-        switch (rareNonInheritedData->m_willChange->m_properties[i]) {
-        case CSSPropertyOpacity:
-        case CSSPropertyTransform:
-        case CSSPropertyWebkitTransform:
-        case CSSPropertyTop:
-        case CSSPropertyLeft:
-        case CSSPropertyBottom:
-        case CSSPropertyRight:
-            return true;
-        default:
-            break;
-        }
-    }
-    return false;
-}
-
 inline bool requireTransformOrigin(const Vector<RefPtr<TransformOperation> >& transformOperations, RenderStyle::ApplyTransformOrigin applyOrigin)
 {
     // transform-origin brackets the transform with translate operations.
     // Optimize for the case where the only transform is a translation, since the transform-origin is irrelevant
     // in that case.
     if (applyOrigin != RenderStyle::IncludeTransformOrigin)
         return false;
 
     unsigned size = transformOperations.size();
     for (unsigned i = 0; i < size; ++i) {
@@ skipping 683 matching lines @@
     // right
     radiiSum = radii.topRight().height() + radii.bottomRight().height();
     if (radiiSum > rect.height())
         factor = std::min(rect.height() / radiiSum, factor);
 
     ASSERT(factor <= 1);
     return factor;
 }
 
 } // namespace blink