Construct cc scroll tree from blink [spv2]

third_party/WebKit/Source/platform/testing/TestPaintArtifact.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TestPaintArtifact_h
 #define TestPaintArtifact_h
 
 #include "base/memory/ref_counted.h"
 #include "platform/graphics/Color.h"
 #include "platform/graphics/paint/DisplayItemList.h"
 #include "platform/graphics/paint/PaintArtifact.h"
 #include "wtf/Allocator.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/Vector.h"
 #include <memory>
 
 namespace cc {
 class Layer;
 }
 
 namespace blink {
 
 class ClipPaintPropertyNode;
 class EffectPaintPropertyNode;
 class FloatRect;
 class PaintArtifact;
+class ScrollPaintPropertyNode;
 class TransformPaintPropertyNode;
 
 // Useful for quickly making a paint artifact in unit tests.
 // Must remain in scope while the paint artifact is used, because it owns the
 // display item clients.
 //
 // Usage:
 //   TestPaintArtifact artifact;
 //   artifact.chunk(paintProperties)
 //       .rectDrawing(bounds, color)
 //       .rectDrawing(bounds2, color2);
 //   artifact.chunk(otherPaintProperties)
 //       .rectDrawing(bounds3, color3);
 //   doSomethingWithArtifact(artifact);
 class TestPaintArtifact {
     STACK_ALLOCATED();
 public:
     TestPaintArtifact();
     ~TestPaintArtifact();
 
     // Add to the artifact.
-    TestPaintArtifact& chunk(PassRefPtr<TransformPaintPropertyNode>, PassRefPtr<ClipPaintPropertyNode>, PassRefPtr<EffectPaintPropertyNode>);
+    TestPaintArtifact& chunk(PassRefPtr<TransformPaintPropertyNode>, PassRefPtr<ClipPaintPropertyNode>, PassRefPtr<EffectPaintPropertyNode>, PassRefPtr<ScrollPaintPropertyNode> = nullptr);
     TestPaintArtifact& chunk(const PaintChunkProperties&);
     TestPaintArtifact& rectDrawing(const FloatRect& bounds, Color);
     TestPaintArtifact& foreignLayer(const FloatPoint&, const IntSize&, scoped_refptr<cc::Layer>);
 
     // Can't add more things once this is called.
     const PaintArtifact& build();
 
 private:
     class DummyRectClient;
     Vector<std::unique_ptr<DummyRectClient>> m_dummyClients;
 
     // Exists if m_built is false.
     DisplayItemList m_displayItemList;
     Vector<PaintChunk> m_paintChunks;
 
     // Exists if m_built is true.
     PaintArtifact m_paintArtifact;
 
     bool m_built;
 };
 
 } // namespace blink
 
 #endif // TestPaintArtifact_h