Call PaintLayer::setNeedsRepaint in LayoutBoxModelObject::invalidateDisplayItemClientOnBacking()

third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 387 matching lines @@
             // Note: the subpixel accumulation of layer() does not need to be added here. It is already taken into account.
             squashingLayer->setNeedsDisplayInRect(enclosingIntRect(paintInvalidationRect), invalidationReason);
         }
     } else {
         layer()->compositedLayerMapping()->setContentsNeedDisplayInRect(r, invalidationReason);
     }
 }
 
 void LayoutBoxModelObject::invalidateDisplayItemClientOnBacking(const DisplayItemClientWrapper& displayItemClient, PaintInvalidationReason invalidationReason, const LayoutRect* paintInvalidationRect) const
 {
+    layer()->setNeedsRepaint();
+
     if (layer()->groupedMapping()) {
         if (GraphicsLayer* squashingLayer = layer()->groupedMapping()->squashingLayer()) {
             // Note: the subpixel accumulation of layer() does not need to be added here. It is already taken into account.
             IntRect paintInvalidationRectOnSquashingLayer;
             if (paintInvalidationRect)
                 paintInvalidationRectOnSquashingLayer = enclosingIntRect(*paintInvalidationRect);
             squashingLayer->invalidateDisplayItemClient(displayItemClient, invalidationReason, paintInvalidationRect ? &paintInvalidationRectOnSquashingLayer : nullptr);
         }
     } else if (CompositedLayerMapping* compositedLayerMapping = layer()->compositedLayerMapping()) {
         if (this->displayItemClient() != displayItemClient.displayItemClient() && isBox() && toLayoutBox(this)->usesCompositedScrolling()) {
@@ skipping 645 matching lines @@
     if (rootElementStyle->hasBackground())
         return false;
 
     if (node() != document().firstBodyElement())
         return false;
 
     return true;
 }
 
 } // namespace blink