Alternate approach to updating paint property nodes

third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h

Index: third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
diff --git a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
index 16f07086d7c79ffe1a76b6eefae797928862a7c9..3a17a60032dd303988089aa318323d861465cbef 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
@@ -15,6 +15,7 @@ namespace blink {
 
 class FrameView;
 class LayoutObject;
+class ObjectPaintProperties;
 
 // The context for PaintPropertyTreeBuilder.
 // It's responsible for bookkeeping tree state in other order, for example, the most recent
@@ -67,6 +68,10 @@ public:
     void buildTreeNodes(const LayoutObject&, PaintPropertyTreeBuilderContext&);
 
 private:
+
+    static void clearTransformProperty(const LayoutObject&, void (ObjectPaintProperties::*setter)(PassRefPtr<TransformPaintPropertyNode>));
+    static void updateOrCreateTransformProperty(const LayoutObject&, TransformPaintPropertyNode* (ObjectPaintProperties::*getter)() const, void (ObjectPaintProperties::*setter)(PassRefPtr<TransformPaintPropertyNode>), const TransformationMatrix&, const FloatPoint3D&, PassRefPtr<TransformPaintPropertyNode>);
+
     static void updatePaintOffsetTranslation(const LayoutObject&, PaintPropertyTreeBuilderContext&);
     static void updateTransform(const LayoutObject&, PaintPropertyTreeBuilderContext&);
     static void updateEffect(const LayoutObject&, PaintPropertyTreeBuilderContext&);