WIP: Construct SPV2's scroll paint property tree

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

Index: third_party/WebKit/Source/platform/testing/PaintPrinters.h
diff --git a/third_party/WebKit/Source/platform/testing/PaintPrinters.h b/third_party/WebKit/Source/platform/testing/PaintPrinters.h
index 461655dc39ae5f8e0d52e0f29ff3fd71ec964f29..27631ef29801be0ff6a2488bc8aba4b020191852 100644
--- a/third_party/WebKit/Source/platform/testing/PaintPrinters.h
+++ b/third_party/WebKit/Source/platform/testing/PaintPrinters.h
@@ -14,6 +14,7 @@ struct PaintProperties;
 class ClipPaintPropertyNode;
 class TransformPaintPropertyNode;
 class EffectPaintPropertyNode;
+class ScrollPaintPropertyNode;
 
 // GTest print support for platform paint classes.
 //
@@ -31,6 +32,7 @@ void PrintTo(const PaintChunk&, std::ostream*);
 void PrintTo(const PaintProperties&, std::ostream*);
 void PrintTo(const TransformPaintPropertyNode&, std::ostream*);
 void PrintTo(const EffectPaintPropertyNode&, std::ostream*);
+void PrintTo(const ScrollPaintPropertyNode&, std::ostream*);
 
 } // namespace blink