Set layer scroll data from PaintArtifactCompositor

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/graphics/paint/ScrollPaintPropertyNode.h"
 
 #include "platform/graphics/paint/PropertyTreeState.h"
 
 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;
 }
 
 String ScrollPaintPropertyNode::toString() const {
   StringBuilder text;
   text.append("parent=");
   text.append(String::format("%p", m_parent.get()));
   text.append(" clip=");
   text.append(m_clip.toString());
   text.append(" bounds=");
   text.append(m_bounds.toString());
 
   text.append(" userScrollable=");
   if (m_userScrollableHorizontal && m_userScrollableVertical)
     text.append("both");
   else if (!m_userScrollableHorizontal && !m_userScrollableVertical)
     text.append("none");
   else
     text.append(m_userScrollableHorizontal ? "horizontal" : "vertical");
 
   text.append(" mainThreadReasons=");
   if (m_mainThreadScrollingReasons) {
     text.append(MainThreadScrollingReason::mainThreadScrollingReasonsAsText(
                     m_mainThreadScrollingReasons)
                     .c_str());
   } else {
     text.append("none");
   }
+  if (m_scrollClient)
+    text.append(String::format(" scrollClient=%p", m_scrollClient));
   return text.toString();
 }
 
 #if DCHECK_IS_ON()
 
 String ScrollPaintPropertyNode::toTreeString() const {
   return blink::PropertyTreeStatePrinter<blink::ScrollPaintPropertyNode>()
       .pathAsString(this);
 }
 
 #endif
 
 }  // namespace blink