[SPv2] Add CSS mix-blend-mode support

third_party/WebKit/Source/core/layout/svg/LayoutSVGContainer.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 132 matching lines @@
     case DescendantIsolationRequired:
       m_hasNonIsolatedBlendingDescendants = true;
       m_hasNonIsolatedBlendingDescendantsDirty = false;
       break;
     case DescendantIsolationNeedsUpdate:
       if (m_hasNonIsolatedBlendingDescendantsDirty)
         return;
       m_hasNonIsolatedBlendingDescendantsDirty = true;
       break;
   }
-  if (SVGLayoutSupport::willIsolateBlendingDescendantsForObject(this))
+  if (SVGLayoutSupport::willIsolateBlendingDescendantsForObject(this)) {
+    if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled())
+      setNeedsPaintPropertyUpdate();
     return;
+  }
   if (parent())
     parent()->descendantIsolationRequirementsChanged(state);
 }
 
 void LayoutSVGContainer::paint(const PaintInfo& paintInfo,
                                const LayoutPoint&) const {
   SVGContainerPainter(*this).paint(paintInfo);
 }
 
 void LayoutSVGContainer::addOutlineRects(
@@ skipping 48 matching lines @@
   // under the pointer (i.e., there is no target element), the event is not
   // dispatched."
   return false;
 }
 
 SVGTransformChange LayoutSVGContainer::calculateLocalTransform() {
   return SVGTransformChange::None;
 }
 
 }  // namespace blink