Calculate correct clip foregroundBound and backgroundBound

Source/core/paint/DeprecatedPaintLayerPainter.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 "config.h"
 #include "core/paint/DeprecatedPaintLayerPainter.h"
 
 #include "core/frame/Settings.h"
 #include "core/layout/ClipPathOperation.h"
 #include "core/layout/LayoutBlock.h"
@@ skipping 210 matching lines @@
         clipRecorder.emplace(*context, *m_paintLayer.layoutObject(), DisplayItem::TransparencyClip,
             m_paintLayer.paintingExtent(paintingInfo.rootLayer, paintingInfo.paintDirtyRect, paintingInfo.subPixelAccumulation, paintingInfo.globalPaintFlags()),
             &paintingInfo, LayoutPoint(), paintFlags);
 
         compositingRecorder.emplace(*context, *m_paintLayer.layoutObject(),
             WebCoreCompositeToSkiaComposite(CompositeSourceOver, m_paintLayer.layoutObject()->style()->blendMode()),
             m_paintLayer.layoutObject()->opacity());
     }
 
     DeprecatedPaintLayerPaintingInfo localPaintingInfo(paintingInfo);
+    if (m_paintLayer.compositingState() == PaintsIntoOwnBacking)
+        localPaintingInfo.subPixelAccumulation = m_paintLayer.subpixelAccumulation();
 
     DeprecatedPaintLayerFragments layerFragments;
     if (shouldPaintContent || shouldPaintOutline || isPaintingOverlayScrollbars) {
         // Collect the fragments. This will compute the clip rectangles and paint offsets for each layer fragment.
         ClipRectsCacheSlot cacheSlot = (paintFlags & PaintLayerUncachedClipRects) ? UncachedClipRects : PaintingClipRects;
         ShouldRespectOverflowClip respectOverflowClip = shouldRespectOverflowClip(paintFlags, m_paintLayer.layoutObject());
         if (fragmentPolicy == ForceSingleFragment)
             m_paintLayer.appendSingleFragmentIgnoringPagination(layerFragments, localPaintingInfo.rootLayer, localPaintingInfo.paintDirtyRect, cacheSlot, IgnoreOverlayScrollbarSize, respectOverflowClip, &offsetFromRoot, localPaintingInfo.subPixelAccumulation);
         else
             m_paintLayer.collectFragments(layerFragments, localPaintingInfo.rootLayer, localPaintingInfo.paintDirtyRect, cacheSlot, IgnoreOverlayScrollbarSize, respectOverflowClip, &offsetFromRoot, localPaintingInfo.subPixelAccumulation);
@@ skipping 361 matching lines @@
     if (!m_paintLayer.containsDirtyOverlayScrollbars())
         return;
 
     DeprecatedPaintLayerPaintingInfo paintingInfo(&m_paintLayer, LayoutRect(enclosingIntRect(damageRect)), paintFlags, LayoutSize(), paintingRoot);
     paintLayer(context, paintingInfo, PaintLayerPaintingOverlayScrollbars);
 
     m_paintLayer.setContainsDirtyOverlayScrollbars(false);
 }
 
 } // namespace blink