Merge "CSS Selector: Fix a regression of :first-child and :last-child invalidation" to M58.

third_party/WebKit/Source/core/dom/ContainerNode.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2013 Apple Inc. All rights
  * reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 211 matching lines @@
       DCHECK(!targetNode->parentNode());
       Node& child = *targetNode;
       mutator(*this, child, next);
       ChildListMutationScope(*this).childAdded(child);
       if (document().containsV1ShadowTree())
         child.checkSlotChangeAfterInserted();
       probe::didInsertDOMNode(&child);
       notifyNodeInsertedInternal(child, postInsertionNotificationTargets);
     }
   }
-  for (const auto& targetNode : targets)
-    childrenChanged(
-        ChildrenChange::forInsertion(*targetNode, ChildrenChangeSourceAPI));
+  Node* unchangedPrevious =
+      targets.size() > 0 ? targets[0]->previousSibling() : nullptr;
+  for (const auto& targetNode : targets) {
+    childrenChanged(ChildrenChange::forInsertion(
+        *targetNode, unchangedPrevious, next, ChildrenChangeSourceAPI));
+  }
   for (const auto& descendant : postInsertionNotificationTargets) {
     if (descendant->isConnected())
       descendant->didNotifySubtreeInsertionsToDocument();
   }
   for (const auto& targetNode : targets) {
     if (targetNode->parentNode() == this)
       dispatchChildInsertionEvents(*targetNode);
   }
   dispatchSubtreeModifiedEvent();
 }
@@ skipping 462 matching lines @@
   DCHECK(!root.isShadowRoot());
 
   if (document().containsV1ShadowTree())
     root.checkSlotChangeAfterInserted();
 
   probe::didInsertDOMNode(&root);
 
   NodeVector postInsertionNotificationTargets;
   notifyNodeInsertedInternal(root, postInsertionNotificationTargets);
 
-  childrenChanged(ChildrenChange::forInsertion(root, source));
+  childrenChanged(ChildrenChange::forInsertion(root, root.previousSibling(),
+                                               root.nextSibling(), source));
 
   for (const auto& targetNode : postInsertionNotificationTargets) {
     if (targetNode->isConnected())
       targetNode->didNotifySubtreeInsertionsToDocument();
   }
 }
 
 DISABLE_CFI_PERF
 void ContainerNode::notifyNodeInsertedInternal(
     Node& root,
@@ skipping 749 matching lines @@
     return true;
 
   if (node->isElementNode() && toElement(node)->shadow())
     return true;
 
   return false;
 }
 #endif
 
 }  // namespace blink