Set layer scroll data from PaintArtifactCompositor

third_party/WebKit/Source/platform/graphics/paint/ScrollPaintPropertyNode.cpp

Index: third_party/WebKit/Source/platform/graphics/paint/ScrollPaintPropertyNode.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/paint/ScrollPaintPropertyNode.cpp b/third_party/WebKit/Source/platform/graphics/paint/ScrollPaintPropertyNode.cpp
index fe6018697e9bb21a3b10346fef1dfc6e78cf654c..a26f22a16fe95b02729f815aebb38261d274b871 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/ScrollPaintPropertyNode.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/ScrollPaintPropertyNode.cpp
@@ -9,9 +9,10 @@
 namespace blink {
 
 ScrollPaintPropertyNode* ScrollPaintPropertyNode::root() {
-  DEFINE_STATIC_REF(ScrollPaintPropertyNode, root,
-                    (ScrollPaintPropertyNode::create(
-                        nullptr, IntSize(), IntSize(), false, false, 0)));
+  DEFINE_STATIC_REF(
+      ScrollPaintPropertyNode, root,
+      (ScrollPaintPropertyNode::create(nullptr, IntSize(), IntSize(), false,
+                                       false, 0, nullptr)));
   return root;
 }
 
@@ -40,6 +41,8 @@ String ScrollPaintPropertyNode::toString() const {
   } else {
     text.append("none");
   }
+  if (m_scrollClient)
+    text.append(String::format(" scrollClient=%p", m_scrollClient));
   return text.toString();
 }