[SPv2] Add CSS mix-blend-mode support

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

Index: third_party/WebKit/Source/core/layout/svg/LayoutSVGContainer.cpp
diff --git a/third_party/WebKit/Source/core/layout/svg/LayoutSVGContainer.cpp b/third_party/WebKit/Source/core/layout/svg/LayoutSVGContainer.cpp
index 98112683664ca9df3c4904c2931b3671a6fc57a9..ed6239207638cd7ecfb5175648c0d9f860707110 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGContainer.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGContainer.cpp
@@ -150,8 +150,11 @@ void LayoutSVGContainer::descendantIsolationRequirementsChanged(
       m_hasNonIsolatedBlendingDescendantsDirty = true;
       break;
   }
-  if (SVGLayoutSupport::willIsolateBlendingDescendantsForObject(this))
+  if (SVGLayoutSupport::willIsolateBlendingDescendantsForObject(this)) {
+    if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled())
+      setNeedsPaintPropertyUpdate();
     return;
+  }
   if (parent())
     parent()->descendantIsolationRequirementsChanged(state);
 }