Remove the CSS_COMPOSITING define, the CSS blending and compositing

WebCore/rendering/style/RenderStyle.h

Index: WebCore/rendering/style/RenderStyle.h
===================================================================
--- WebCore/rendering/style/RenderStyle.h	(revision 148420)
+++ WebCore/rendering/style/RenderStyle.h	(working copy)
@@ -946,13 +946,9 @@
     bool hasFilter() const { return false; }
 #endif
 
-#if ENABLE(CSS_COMPOSITING)
     BlendMode blendMode() const { return static_cast<BlendMode>(rareNonInheritedData->m_effectiveBlendMode); }
     void setBlendMode(BlendMode v) { rareNonInheritedData.access()->m_effectiveBlendMode = v; }
     bool hasBlendMode() const { return static_cast<BlendMode>(rareNonInheritedData->m_effectiveBlendMode) != BlendModeNormal; }
-#else
-    bool hasBlendMode() const { return false; }
-#endif
  
 #if USE(RTL_SCROLLBAR)
     bool shouldPlaceBlockDirectionScrollbarOnLogicalLeft() const { return !isLeftToRightDirection() && isHorizontalWritingMode(); }
@@ -1709,9 +1705,7 @@
 #if ENABLE(CSS_FILTERS)
     static const FilterOperations& initialFilter() { DEFINE_STATIC_LOCAL(FilterOperations, ops, ()); return ops; }
 #endif
-#if ENABLE(CSS_COMPOSITING)
     static BlendMode initialBlendMode() { return BlendModeNormal; }
-#endif
 private:
     void setVisitedLinkColor(const Color&);
     void setVisitedLinkBackgroundColor(const Color& v) { SET_VAR(rareNonInheritedData, m_visitedLinkBackgroundColor, v); }