Corrected insertion point style recalc.

Source/core/dom/shadow/InsertionPoint.cpp

Index: Source/core/dom/shadow/InsertionPoint.cpp
diff --git a/Source/core/dom/shadow/InsertionPoint.cpp b/Source/core/dom/shadow/InsertionPoint.cpp
index 80a1bfa418f16b37ac8dd6da9d08b6a8cc29402c..8641059b6f7bb324a6ecfc72428fdbcbbf913094 100644
--- a/Source/core/dom/shadow/InsertionPoint.cpp
+++ b/Source/core/dom/shadow/InsertionPoint.cpp
@@ -120,7 +120,7 @@ void InsertionPoint::detach(const AttachContext& context)
 
 void InsertionPoint::willRecalcStyle(StyleRecalcChange change)
 {
-    if (change < Inherit)
+    if (change < Inherit && styleChangeType() < SubtreeStyleChange)
         return;
     for (size_t i = 0; i < m_distribution.size(); ++i)
         m_distribution.at(i)->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::PropagateInheritChangeToDistributedNodes));