WIP: Construct SPV2's scroll paint property tree

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

Index: third_party/WebKit/Source/platform/testing/PaintPrinters.cpp
diff --git a/third_party/WebKit/Source/platform/testing/PaintPrinters.cpp b/third_party/WebKit/Source/platform/testing/PaintPrinters.cpp
index e786d3444975bfe87a1f2f26bf3d749131c7e8b0..860c6ed8631634a99b3d65e3ad6f0f977f59f560 100644
--- a/third_party/WebKit/Source/platform/testing/PaintPrinters.cpp
+++ b/third_party/WebKit/Source/platform/testing/PaintPrinters.cpp
@@ -100,6 +100,14 @@ void PrintTo(const PaintChunkProperties& properties, std::ostream* os)
         printedProperty = true;
     }
 
+    if (properties.scroll) {
+        if (printedProperty)
+            *os << ", ";
+        *os << "scroll=";
+        PrintTo(*properties.scroll, os);
+        printedProperty = true;
+    }
+
     if (printedProperty)
         *os << ", ";
     *os << "backfaceHidden=" << properties.backfaceHidden;
@@ -121,4 +129,19 @@ void PrintTo(const EffectPaintPropertyNode& effect, std::ostream* os)
     *os << "EffectPaintPropertyNode(opacity=" << effect.opacity() << ")";
 }
 
+void PrintTo(const ScrollPaintPropertyNode& node, std::ostream* os)
+{
+    *os << "ScrollPaintPropertyNode(clip=";
+    PrintTo(node.clip(), os);
+    *os << ", bounds=";
+    PrintTo(node.bounds(), os);
+    *os << ", userScrollableHorizontal=" << node.userScrollableHorizontal();
+    *os << ", userScrollableVertical=" << node.userScrollableVertical();
+    *os << ", scrollOffsetTranslation=";
+    PrintPointer(node.scrollOffsetTranslation(), *os);
+    *os << ", parent=";
+    PrintPointer(node.parent(), *os);
+    *os << ")";
+}
+
 } // namespace blink