Support slotchange event

third_party/WebKit/Source/core/dom/shadow/ShadowRoot.h

 /*
  * Copyright (C) 2011 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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 103 matching lines @@
     void didAddInsertionPoint(InsertionPoint*);
     void didRemoveInsertionPoint(InsertionPoint*);
     const HeapVector<Member<InsertionPoint>>& descendantInsertionPoints();
 
     ShadowRootType type() const { return static_cast<ShadowRootType>(m_type); }
 
     void didAddSlot();
     void didRemoveSlot();
     const HeapVector<Member<HTMLSlotElement>>& descendantSlots();
 
+    void assignV1();
     void distributeV1();
 
     HTMLSlotElement* assignedSlotFor(const Node& node) const
     {
         DCHECK(m_slotAssignment);
         return m_slotAssignment->assignedSlotFor(node);
     }
 
     // Make protected methods from base class public here.
     using TreeScope::setDocument;
@@ skipping 62 matching lines @@
     return nullptr;
 }
 
 DEFINE_NODE_TYPE_CASTS(ShadowRoot, isShadowRoot());
 DEFINE_TYPE_CASTS(ShadowRoot, TreeScope, treeScope, treeScope->rootNode().isShadowRoot(), treeScope.rootNode().isShadowRoot());
 DEFINE_TYPE_CASTS(TreeScope, ShadowRoot, shadowRoot, true, true);
 
 } // namespace blink
 
 #endif // ShadowRoot_h