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

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 14ea841bfb4f8e638d53f6c332c998c02f8a8ec8..e24927b5ea36a642338146bf088d8cb71a66833e 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGContainer.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGContainer.cpp
@@ -111,18 +111,23 @@ void LayoutSVGContainer::styleDidChange(StyleDifference diff,
   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 {