Pass nextTextSibling to ::before layout rebuild.

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 1280 matching lines @@
     } else if (child->isElementNode()) {
       Element* element = toElement(child);
       if (element->shouldCallRecalcStyle(change))
         element->recalcStyle(change);
       else if (element->supportsStyleSharing())
         styleResolver.addToStyleSharingList(*element);
     }
   }
 }
 
-void ContainerNode::rebuildChildrenLayoutTrees() {
+void ContainerNode::rebuildChildrenLayoutTrees(Text*& nextTextSibling) {
   DCHECK(!needsReattachLayoutTree());
 
   // This loop is deliberately backwards because we use insertBefore in the
   // layout tree, and want to avoid a potentially n^2 loop to find the insertion
   // point while building the layout tree.  Having us start from the last child
   // and work our way back means in the common case, we'll find the insertion
   // point in O(1) time.  See crbug.com/288225
-  Text* lastTextNode = nullptr;
   for (Node* child = lastChild(); child; child = child->previousSibling()) {
     bool rebuildChild = child->needsReattachLayoutTree() ||
                         child->childNeedsReattachLayoutTree();
     if (child->isTextNode()) {
       Text* textNode = toText(child);
       if (rebuildChild)
-        textNode->rebuildTextLayoutTree(lastTextNode);
-      lastTextNode = textNode;
+        textNode->rebuildTextLayoutTree(nextTextSibling);
+      nextTextSibling = textNode;
     } else if (child->isElementNode()) {
       Element* element = toElement(child);
       if (rebuildChild)
-        element->rebuildLayoutTree(lastTextNode);
+        element->rebuildLayoutTree(nextTextSibling);
       if (element->layoutObject())
-        lastTextNode = nullptr;
+        nextTextSibling = nullptr;
     }
   }
   // This is done in ContainerNode::attachLayoutTree but will never be cleared
   // if we don't enter ContainerNode::attachLayoutTree so we do it here.
   clearChildNeedsStyleRecalc();
   clearChildNeedsReattachLayoutTree();
 }
 
 void ContainerNode::checkForSiblingStyleChanges(SiblingCheckType changeType,
                                                 Element* changedElement,
@@ skipping 167 matching lines @@
     return true;
 
   if (node->isElementNode() && toElement(node)->shadow())
     return true;
 
   return false;
 }
 #endif
 
 }  // namespace blink