Add background attachment fixed main thread scrolling reason [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 202 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(" hasBackgroundAttachmentFixedMainThreadScrollingReason=");
+        stringBuilder.append(node->hasBackgroundAttachmentFixedMainThreadScrollingReason() ? "yes" : "no");
     }
 };
 
 class PaintPropertyTreeGraphBuilder {
 public:
     PaintPropertyTreeGraphBuilder() { }
 
     void generateTreeGraph(const FrameView& frameView, StringBuilder& stringBuilder)
     {
         m_layout.str("");
@@ skipping 292 matching lines @@
 
 String paintPropertyTreeGraph(const blink::FrameView& frameView)
 {
     blink::PaintPropertyTreeGraphBuilder builder;
     StringBuilder stringBuilder;
     builder.generateTreeGraph(frameView, stringBuilder);
     return stringBuilder.toString();
 }
 
 #endif