WIP: Construct SPV2's scroll paint property tree

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

Index: third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp
diff --git a/third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp b/third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp
index 9394b5d289e9e27556dee672377b056b3c1aef68..a25ee71b9339d08572148371ddb89fd43d3c4296 100644
--- a/third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp
+++ b/third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp
@@ -53,12 +53,14 @@ TestPaintArtifact::~TestPaintArtifact()
 TestPaintArtifact& TestPaintArtifact::chunk(
     PassRefPtr<TransformPaintPropertyNode> transform,
     PassRefPtr<ClipPaintPropertyNode> clip,
-    PassRefPtr<EffectPaintPropertyNode> effect)
+    PassRefPtr<EffectPaintPropertyNode> effect,
+    PassRefPtr<ScrollPaintPropertyNode> scroll)
 {
     PaintChunkProperties properties;
     properties.transform = transform;
     properties.clip = clip;
     properties.effect = effect;
+    properties.scroll = scroll;
     return chunk(properties);
 }