Incrementally build main thread scrolling reasons [spv2]

third_party/WebKit/Source/core/paint/PaintPropertyTreePrinter.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 "core/paint/PaintPropertyTreePrinter.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/layout/LayoutPart.h"
 #include "core/layout/LayoutView.h"
@@ skipping 274 matching lines @@
     stringBuilder.append(" scrollOffsetTranslation=");
     stringBuilder.append(scrollOffset.toString());
     stringBuilder.append(" clip=");
     stringBuilder.append(node->clip().toString());
     stringBuilder.append(" bounds=");
     stringBuilder.append(node->bounds().toString());
     stringBuilder.append(" userScrollableHorizontal=");
     stringBuilder.append(node->userScrollableHorizontal() ? "yes" : "no");
     stringBuilder.append(" userScrollableVertical=");
     stringBuilder.append(node->userScrollableVertical() ? "yes" : "no");
+    stringBuilder.append(" threadedScrollingDisabled=");
+    stringBuilder.append(node->threadedScrollingDisabled() ? "yes" : "no");
+    stringBuilder.append(" hasBackgroundAttachmentFixedDescendants=");
     stringBuilder.append(
-        " hasBackgroundAttachmentFixedMainThreadScrollingReason=");
-    stringBuilder.append(
-        node->hasMainThreadScrollingReasons(
-            MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects)
-            ? "yes"
-            : "no");
+        node->hasBackgroundAttachmentFixedDescendants() ? "yes" : "no");
   }
 };
 
 class PaintPropertyTreeGraphBuilder {
  public:
   PaintPropertyTreeGraphBuilder() {}
 
   void generateTreeGraph(const FrameView& frameView,
                          StringBuilder& stringBuilder) {
     m_layout.str("");
@@ skipping 215 matching lines @@
     if (preTranslation)
       writePaintPropertyNode(*preTranslation, &frameView, "preTranslation");
     TransformPaintPropertyNode* scrollTranslation =
         frameView.scrollTranslation();
     if (scrollTranslation)
       writePaintPropertyNode(*scrollTranslation, &frameView,
                              "scrollTranslation");
     ClipPaintPropertyNode* contentClip = frameView.contentClip();
     if (contentClip)
       writePaintPropertyNode(*contentClip, &frameView, "contentClip");
-    ScrollPaintPropertyNode* scroll = frameView.scroll();
+    const ScrollPaintPropertyNode* scroll = frameView.scroll();
     if (scroll)
       writePaintPropertyNode(*scroll, &frameView, "scroll");
   }
 
   void writeLayoutObjectNode(const LayoutObject& object) {
     std::ostream& os = m_layout;
     os << "n" << &object << " [color=" << s_layoutNodeColor
        << ", fontcolor=" << s_layoutNodeColor << ", label=\"" << object.name();
     Node* node = object.node();
     if (node) {
@@ skipping 147 matching lines @@
 }
 
 String paintPropertyTreeGraph(const blink::FrameView& frameView) {
   blink::PaintPropertyTreeGraphBuilder builder;
   StringBuilder stringBuilder;
   builder.generateTreeGraph(frameView, stringBuilder);
   return stringBuilder.toString();
 }
 
 #endif