Support slotchange event

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

 /*
  * 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 326 matching lines @@
     DCHECK(m_shadowRootRareData);
     HeapVector<Member<HTMLSlotElement>> slots;
     slots.reserveCapacity(descendantSlotCount());
     for (HTMLSlotElement& slot : Traversal<HTMLSlotElement>::descendantsOf(rootNode()))
         slots.append(&slot);
     m_shadowRootRareData->setDescendantSlots(slots);
     m_descendantSlotsIsValid = true;
     return m_shadowRootRareData->descendantSlots();
 }
 
+void ShadowRoot::assignV1()
+{
+    if (!m_slotAssignment)
+        m_slotAssignment = SlotAssignment::create();
+    m_slotAssignment->resolveAssignment(*this);
+}
+
 void ShadowRoot::distributeV1()
 {
     if (!m_slotAssignment)
         m_slotAssignment = SlotAssignment::create();
-    m_slotAssignment->resolveAssignment(*this);
+    m_slotAssignment->resolveDistribution(*this);
 }
 
 DEFINE_TRACE(ShadowRoot)
 {
     visitor->trace(m_prev);
     visitor->trace(m_next);
     visitor->trace(m_shadowRootRareData);
     visitor->trace(m_shadowRootRareDataV0);
     visitor->trace(m_slotAssignment);
     TreeScope::trace(visitor);
@@ skipping 13 matching lines @@
         ostream << "ShadowRootType::Open";
         break;
     case ShadowRootType::Closed:
         ostream << "ShadowRootType::Closed";
         break;
     }
     return ostream;
 }
 
 } // namespace blink