Use invalidation sets to invalidate slotted elements.

third_party/WebKit/Source/core/css/invalidation/InvalidationSet.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 91 matching lines @@
 
     void setTreeBoundaryCrossing() { m_treeBoundaryCrossing = true; }
     bool treeBoundaryCrossing() const { return m_treeBoundaryCrossing; }
 
     void setInsertionPointCrossing() { m_insertionPointCrossing = true; }
     bool insertionPointCrossing() const { return m_insertionPointCrossing; }
 
     void setCustomPseudoInvalid() { m_customPseudoInvalid = true; }
     bool customPseudoInvalid() const { return m_customPseudoInvalid; }
 
-    bool isEmpty() const { return !m_classes && !m_ids && !m_tagNames && !m_attributes && !m_customPseudoInvalid && !m_insertionPointCrossing; }
+    void setInvalidatesSlotted() { m_invalidatesSlotted = true; }
+    bool invalidatesSlotted() const { return m_invalidatesSlotted; }
+
+    bool isEmpty() const { return !m_classes && !m_ids && !m_tagNames && !m_attributes && !m_customPseudoInvalid && !m_insertionPointCrossing && !m_invalidatesSlotted; }
 
     void toTracedValue(TracedValue*) const;
 
 #ifndef NDEBUG
     void show() const;
 #endif
 
     const HashSet<AtomicString>& classSetForTesting() const { ASSERT(m_classes); return *m_classes; }
     const HashSet<AtomicString>& idSetForTesting() const { ASSERT(m_ids); return *m_ids; }
     const HashSet<AtomicString>& tagNameSetForTesting() const { ASSERT(m_tagNames); return *m_tagNames; }
@@ skipping 34 matching lines @@
     unsigned m_invalidatesSelf : 1;
 
     // If true, all descendants which are custom pseudo elements must be invalidated.
     unsigned m_customPseudoInvalid : 1;
 
     // If true, the invalidation must traverse into ShadowRoots with this set.
     unsigned m_treeBoundaryCrossing : 1;
 
     // If true, insertion point descendants must be invalidated.
     unsigned m_insertionPointCrossing : 1;
+
+    // If true, distributed nodes of <slot> elements need to be invalidated.
+    unsigned m_invalidatesSlotted : 1;
 };
 
 class CORE_EXPORT DescendantInvalidationSet final : public InvalidationSet {
 public:
     static PassRefPtr<DescendantInvalidationSet> create()
     {
         return adoptRef(new DescendantInvalidationSet);
     }
 
 private:
@@ skipping 37 matching lines @@
     InvalidationSetVector descendants;
     InvalidationSetVector siblings;
 };
 
 DEFINE_TYPE_CASTS(DescendantInvalidationSet, InvalidationSet, value, value->isDescendantInvalidationSet(), value.isDescendantInvalidationSet());
 DEFINE_TYPE_CASTS(SiblingInvalidationSet, InvalidationSet, value, value->isSiblingInvalidationSet(), value.isSiblingInvalidationSet());
 
 } // namespace blink
 
 #endif // InvalidationSet_h