Remove the CSS_COMPOSITING define, leaving the implementation under the runtime flag, since runtime…

Source/core/rendering/RenderObject.cpp

Index: Source/core/rendering/RenderObject.cpp
diff --git a/Source/core/rendering/RenderObject.cpp b/Source/core/rendering/RenderObject.cpp
index c0349d834b30783df404884e724a486afcb3d8a6..429ff8017c977104bdb548f8989741f7dbb212b8 100644
--- a/Source/core/rendering/RenderObject.cpp
+++ b/Source/core/rendering/RenderObject.cpp
@@ -2793,6 +2793,11 @@ PassRefPtr<RenderStyle> RenderObject::getUncachedPseudoStyle(const PseudoStyleRe
     return document()->styleResolver()->pseudoStyleForElement(element, pseudoStyleRequest, parentStyle);
 }
 
+bool RenderObject::hasBlendMode() const
+{
+    return RuntimeEnabledFeatures::cssCompositingEnabled() && style() && style()->hasBlendMode();
+}
+
 static Color decorationColor(RenderStyle* style)
 {
     Color result;