Set needs paint property update for changes of SVG isolation and blending.

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 93 matching lines @@
   return SVGLayoutSupport::hasFilterResource(*this);
 }
 
 void LayoutSVGContainer::styleDidChange(StyleDifference diff,
                                         const ComputedStyle* oldStyle) {
   LayoutSVGModelObject::styleDidChange(diff, oldStyle);
 
   bool hadIsolation =
       oldStyle && !isSVGHiddenContainer() &&
       SVGLayoutSupport::willIsolateBlendingDescendantsForStyle(*oldStyle);
-  bool isolationChanged =
-      hadIsolation ==
-      !SVGLayoutSupport::willIsolateBlendingDescendantsForObject(this);
+
+  bool willIsolateBlendingDescendants =
+      SVGLayoutSupport::willIsolateBlendingDescendantsForObject(this);
+
+  bool isolationChanged = hadIsolation != willIsolateBlendingDescendants;
+
+  if (isolationChanged)
+    setNeedsPaintPropertyUpdate();
 
   if (!parent() || !isolationChanged)
     return;
 
-  if (hasNonIsolatedBlendingDescendants())
+  if (hasNonIsolatedBlendingDescendants()) {
     parent()->descendantIsolationRequirementsChanged(
-        SVGLayoutSupport::willIsolateBlendingDescendantsForObject(this)
-            ? DescendantIsolationNeedsUpdate
-            : DescendantIsolationRequired);
+        willIsolateBlendingDescendants ? DescendantIsolationNeedsUpdate
+                                       : DescendantIsolationRequired);
+  }
 }
 
 bool LayoutSVGContainer::hasNonIsolatedBlendingDescendants() const {
   if (m_hasNonIsolatedBlendingDescendantsDirty) {
     m_hasNonIsolatedBlendingDescendants =
         SVGLayoutSupport::computeHasNonIsolatedBlendingDescendants(this);
     m_hasNonIsolatedBlendingDescendantsDirty = false;
   }
   return m_hasNonIsolatedBlendingDescendants;
 }
@@ skipping 77 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