Turn FilterEffectBuilder into a stack-allocated helper

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

Index: third_party/WebKit/Source/core/paint/PaintLayerFilterInfo.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerFilterInfo.h b/third_party/WebKit/Source/core/paint/PaintLayerFilterInfo.h
index c2673ada8fe622a194d59bd19bdd1b1e8cb6275a..7a2616d972966cb275ea43a3e283f4aca54d70b7 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerFilterInfo.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayerFilterInfo.h
@@ -33,12 +33,10 @@
 #include "core/svg/SVGResourceClient.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefPtr.h"
 
 namespace blink {
 
-class FilterEffectBuilder;
+class FilterEffect;
 class FilterOperations;
 class PaintLayer;
 
@@ -58,8 +56,8 @@ public:
     explicit PaintLayerFilterInfo(PaintLayer*);
     ~PaintLayerFilterInfo() override;
 
-    FilterEffectBuilder* builder() const { return m_builder.get(); }
-    void setBuilder(FilterEffectBuilder*);
+    FilterEffect* lastEffect() const { return m_lastEffect; }
+    void setLastEffect(FilterEffect*);
 
     void updateReferenceFilterClients(const FilterOperations&);
     void clearLayer() { m_layer = nullptr; }
@@ -71,7 +69,7 @@ public:
 private:
     // |clearLayer| must be called before *m_layer becomes invalid.
     PaintLayer* m_layer;
-    Member<FilterEffectBuilder> m_builder;
+    Member<FilterEffect> m_lastEffect;
 };
 
 } // namespace blink