Split out the style-determined direct compositing reasons

Source/core/rendering/compositing/CompositingReasonFinder.h

Index: Source/core/rendering/compositing/CompositingReasonFinder.h
diff --git a/Source/core/rendering/compositing/CompositingReasonFinder.h b/Source/core/rendering/compositing/CompositingReasonFinder.h
index 6ac22ef1a04faf256db7b96089874fe357588b19..74a33361bf79c3d567652a726df068c141a467fe 100644
--- a/Source/core/rendering/compositing/CompositingReasonFinder.h
+++ b/Source/core/rendering/compositing/CompositingReasonFinder.h
@@ -35,6 +35,9 @@ public:
 private:
     bool isMainFrame() const;
 
+    CompositingReasons styleDeterminedDirectReasons(RenderObject*) const;
+    CompositingReasons nonStyleDeterminedDirectReasons(const RenderLayer*, bool* needToRecomputeCompositingRequirements) const;
+
     bool requiresCompositingForAnimation(RenderObject*) const;
     bool requiresCompositingForTransform(RenderObject*) const;
     bool requiresCompositingForBackfaceVisibilityHidden(RenderObject*) const;