Add an assertion to make sure NodeRenderingTraversal::parent is called after the distribution resul…

Source/core/dom/NodeRenderingTraversal.cpp

Index: Source/core/dom/NodeRenderingTraversal.cpp
diff --git a/Source/core/dom/NodeRenderingTraversal.cpp b/Source/core/dom/NodeRenderingTraversal.cpp
index a25c01058231c2fbb6c8c08e1befa5cad1c86d1c..38e164b2bebcaca439189e4265bad06a4b13e166 100644
--- a/Source/core/dom/NodeRenderingTraversal.cpp
+++ b/Source/core/dom/NodeRenderingTraversal.cpp
@@ -54,10 +54,8 @@ void ParentDetails::didTraverseInsertionPoint(const InsertionPoint* insertionPoi
 
 ContainerNode* parent(const Node* node, ParentDetails* details)
 {
-    // FIXME: We should probably ASSERT(!node->document().childNeedsDistributionRecalc()) here, but
-    // a bunch of things use NodeRenderingTraversal::parent in places where that looks like it could
-    // be false.
     ASSERT(node);
+    ASSERT(!node->document().childNeedsDistributionRecalc());
     if (isActiveInsertionPoint(*node))
         return 0;
     ComposedTreeWalker walker(node, ComposedTreeWalker::CanStartFromShadowBoundary);