WIP: Construct SPV2's scroll paint property tree

third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp

 // Copyright 2014 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/PaintLayerPainter.h"
 
 #include "core/frame/LocalFrame.h"
 #include "core/layout/LayoutInline.h"
 #include "core/layout/LayoutView.h"
 #include "core/paint/ClipPathClipper.h"
@@ skipping 315 matching lines @@
     { // Begin block for the lifetime of any filter.
         FilterPainter filterPainter(m_paintLayer, context, offsetFromRoot, layerFragments.isEmpty() ? ClipRect() : layerFragments[0].backgroundRect, localPaintingInfo, paintFlags);
 
         Optional<ScopedPaintChunkProperties> scopedPaintChunkProperties;
         if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
             const ObjectPaintProperties* objectPaintProperties = m_paintLayer.layoutObject()->objectPaintProperties();
             ASSERT(objectPaintProperties && objectPaintProperties->localBorderBoxProperties());
             PaintChunkProperties properties(context.getPaintController().currentPaintChunkProperties());
             auto& localBorderBoxProperties = *objectPaintProperties->localBorderBoxProperties();
             properties.transform = localBorderBoxProperties.propertyTreeState.transform;
+            properties.scroll = localBorderBoxProperties.scroll;
             properties.clip = localBorderBoxProperties.propertyTreeState.clip;
             properties.effect = localBorderBoxProperties.propertyTreeState.effect;
             properties.backfaceHidden = m_paintLayer.layoutObject()->hasHiddenBackface();
             scopedPaintChunkProperties.emplace(context.getPaintController(), m_paintLayer, properties);
         }
 
         bool isPaintingRootLayer = (&m_paintLayer) == paintingInfo.rootLayer;
         bool shouldPaintBackground = shouldPaintContent && !selectionOnly
             && (isPaintingCompositedBackground || (isPaintingRootLayer && !(paintFlags & PaintLayerPaintingSkipRootBackground)));
         bool shouldPaintNegZOrderList = (isPaintingScrollingContent && isPaintingOverflowContents) || (!isPaintingScrollingContent && isPaintingCompositedBackground);
@@ skipping 444 matching lines @@
     if (!m_paintLayer.containsDirtyOverlayScrollbars())
         return;
 
     PaintLayerPaintingInfo paintingInfo(&m_paintLayer, LayoutRect(enclosingIntRect(damageRect)), paintFlags, LayoutSize());
     paintLayer(context, paintingInfo, PaintLayerPaintingOverlayScrollbars);
 
     m_paintLayer.setContainsDirtyOverlayScrollbars(false);
 }
 
 } // namespace blink