Make scroll translation transform nodes reference scroll nodes

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 09b623aadda84f0396c18166d68095290f7ae12e..e3a09aa3a98d8733633586aa71c53378ce9af4d3 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/ScrollPaintPropertyNode.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/ScrollPaintPropertyNode.cpp
@@ -11,28 +11,23 @@ namespace blink {
 ScrollPaintPropertyNode* ScrollPaintPropertyNode::root() {
   DEFINE_STATIC_REF(ScrollPaintPropertyNode, root,
                     (ScrollPaintPropertyNode::create(
-                        nullptr, TransformPaintPropertyNode::root(), IntSize(),
-                        IntSize(), false, false, 0)));
+                        nullptr, IntSize(), IntSize(), false, false, 0)));
   return root;
 }
 
 String ScrollPaintPropertyNode::toString() const {
-  FloatSize scrollOffset =
-      m_scrollOffsetTranslation->matrix().to2DTranslation();
   std::string mainThreadScrollingReasonsAsText =
       MainThreadScrollingReason::mainThreadScrollingReasonsAsText(
           m_mainThreadScrollingReasons);
   return String::format(
-      "parent=%p scrollOffsetTranslation=%s clip=%s bounds=%s "
+      "parent=%p clip=%s bounds=%s "
       "userScrollableHorizontal=%s"
-      " userScrollableVertical=%s mainThreadScrollingReasons=%s"
-      "compositorElementId=(%d, %d)",
-      m_parent.get(), scrollOffset.toString().ascii().data(),
-      m_clip.toString().ascii().data(), m_bounds.toString().ascii().data(),
+      " userScrollableVertical=%s mainThreadScrollingReasons=%s",
+      m_parent.get(), m_clip.toString().ascii().data(),
+      m_bounds.toString().ascii().data(),
       m_userScrollableHorizontal ? "yes" : "no",
       m_userScrollableVertical ? "yes" : "no",
-      mainThreadScrollingReasonsAsText.c_str(), m_compositorElementId.primaryId,
-      m_compositorElementId.secondaryId);
+      mainThreadScrollingReasonsAsText.c_str());
 }
 
 #if DCHECK_IS_ON()