Isolation of subtrees of stacking contexts and out-of-flow positioned objects

third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.h

Index: third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.h b/third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.h
index d0d51bfbf7170e51ff9963fc4d53911600e7fa46..6a98d168ad52a55fe8c491f8780ff0fe47b3fa82 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.h
@@ -6,9 +6,7 @@
 #define EffectPaintPropertyNode_h
 
 #include "platform/PlatformExport.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
+#include "platform/graphics/paint/PaintPropertyNode.h"
 
 #include <iosfwd>
 
@@ -17,7 +15,7 @@ namespace blink {
 // A paint effect created by the opacity css property along with a reference to
 // the parent effect node, or nullptr for the root.
 // TODO(pdr): Support more effects than just opacity.
-class PLATFORM_EXPORT EffectPaintPropertyNode : public RefCounted<EffectPaintPropertyNode> {
+class PLATFORM_EXPORT EffectPaintPropertyNode : public PaintPropertyNode<EffectPaintPropertyNode> {
 public:
     using Value = float;
 
@@ -29,18 +27,11 @@ public:
     Value value() const { return m_opacity; }
     float opacity() const { return m_opacity; }
 
-    // Parent effect or nullptr if this is the root effect.
-    const EffectPaintPropertyNode* parent() const { return m_parent.get(); }
-
-    // Moves this node and its subtrees under another parent.
-    void setParent(PassRefPtr<EffectPaintPropertyNode> parent) { m_parent = parent; }
-
 private:
     EffectPaintPropertyNode(float opacity, PassRefPtr<EffectPaintPropertyNode> parent)
-        : m_opacity(opacity), m_parent(parent) { }
+        : PaintPropertyNode(parent), m_opacity(opacity) { }
 
     const float m_opacity;
-    RefPtr<EffectPaintPropertyNode> m_parent;
 };
 
 // Redeclared here to avoid ODR issues.