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

Source/core/rendering/RenderObject.h

Index: Source/core/rendering/RenderObject.h
diff --git a/Source/core/rendering/RenderObject.h b/Source/core/rendering/RenderObject.h
index 243ec1b567aab566c283fc4c20a29e04e365f1fd..3b24bbaf1ff2dadc0466ed84af49d5050b43bc86 100644
--- a/Source/core/rendering/RenderObject.h
+++ b/Source/core/rendering/RenderObject.h
@@ -589,11 +589,7 @@ public:
 
     bool hasFilter() const { return style() && style()->hasFilter(); }
 
-#if ENABLE(CSS_COMPOSITING)
-    bool hasBlendMode() const { return style() && style()->hasBlendMode(); }
-#else
-    bool hasBlendMode() const { return false; }
-#endif
+    bool hasBlendMode() const;
 
     inline bool preservesNewline() const;