Drop InvalidationSetMode.

Source/core/css/invalidation/StyleInvalidator.cpp

Index: Source/core/css/invalidation/StyleInvalidator.cpp
diff --git a/Source/core/css/invalidation/StyleInvalidator.cpp b/Source/core/css/invalidation/StyleInvalidator.cpp
index cefc3d7b17650398f523f56d1e6adc0d4ec46b8d..8687cd29c5e9ff4c492318b9b0d683af1bd74aae 100644
--- a/Source/core/css/invalidation/StyleInvalidator.cpp
+++ b/Source/core/css/invalidation/StyleInvalidator.cpp
@@ -74,6 +74,8 @@ void StyleInvalidator::RecursionData::pushInvalidationSet(const DescendantInvali
     ASSERT(!m_wholeSubtreeInvalid);
     if (invalidationSet.treeBoundaryCrossing())
         m_treeBoundaryCrossing = true;
+    if (invalidationSet.insertionPointCrossing())
+        m_insertionPointCrossing = true;
     if (invalidationSet.wholeSubtreeInvalid()) {
         m_wholeSubtreeInvalid = true;
         return;
@@ -89,6 +91,9 @@ bool StyleInvalidator::RecursionData::matchesCurrentInvalidationSets(Element& el
     if (m_invalidateCustomPseudo && element.shadowPseudoId() != nullAtom)
         return true;
 
+    if (m_insertionPointCrossing && element.isInsertionPoint())
+        return true;
+
     for (InvalidationSets::iterator it = m_invalidationSets.begin(); it != m_invalidationSets.end(); ++it) {
         if ((*it)->invalidatesElement(element))
             return true;
@@ -154,6 +159,12 @@ bool StyleInvalidator::invalidate(Element& element, StyleInvalidator::RecursionD
             element.setNeedsStyleRecalc(LocalStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::StyleInvalidator));
     }
 
+    if (recursionData.insertionPointCrossing() && element.isInsertionPoint()) {
+        const InsertionPoint& insertionPoint = toInsertionPoint(element);
+        for (size_t i = 0; i < insertionPoint.size(); ++i)
+            insertionPoint.at(i)->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::StyleInvalidator));
+    }
+
     element.clearChildNeedsStyleInvalidation();
     element.clearNeedsStyleInvalidation();