Revert 151996 "Avoid N^2 walk placing renderers when building th..."

Source/core/dom/ContainerNodeAlgorithms.h

Index: Source/core/dom/ContainerNodeAlgorithms.h
diff --git a/Source/core/dom/ContainerNodeAlgorithms.h b/Source/core/dom/ContainerNodeAlgorithms.h
index d591b77ea79170b99cf7acb08ed0d16375cc3ded..5e09a6b5255e434963d940634226bd6522e943f3 100644
--- a/Source/core/dom/ContainerNodeAlgorithms.h
+++ b/Source/core/dom/ContainerNodeAlgorithms.h
@@ -219,15 +219,14 @@ inline void ChildNodeInsertionNotifier::notify(Node* node)
 
     RefPtr<Document> protectDocument(node->document());
     RefPtr<Node> protectNode(node);
-    InsertionCallbackDeferer insertionCallbackDeferer;
 
     if (m_insertionPoint->inDocument())
         notifyNodeInsertedIntoDocument(node);
     else if (node->isContainerNode())
         notifyNodeInsertedIntoTree(toContainerNode(node));
 
-    for (size_t i = m_postInsertionNotificationTargets.size(); i; --i)
-        m_postInsertionNotificationTargets[i - 1]->didNotifySubtreeInsertions(m_insertionPoint);
+    for (size_t i = 0; i < m_postInsertionNotificationTargets.size(); ++i)
+        m_postInsertionNotificationTargets[i]->didNotifySubtreeInsertions(m_insertionPoint);
 }