Begin tracking why layout is invalidated

Source/core/layout/LayoutCounter.cpp

 /**
  * Copyright (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 401 matching lines @@
 {
     setText(originalText());
 }
 
 void LayoutCounter::invalidate()
 {
     m_counterNode->removeRenderer(this);
     ASSERT(!m_counterNode);
     if (documentBeingDestroyed())
         return;
-    setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
+    setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::CountersChanged);
 }
 
 static void destroyCounterNodeWithoutMapRemoval(const AtomicString& identifier, CounterNode* node)
 {
     CounterNode* previous;
     for (RefPtr<CounterNode> child = node->lastDescendant(); child && child != node; child = previous) {
         previous = child->previousInPreOrder();
         child->parent()->removeChild(child.get());
         ASSERT(counterMaps().get(&child->owner())->get(identifier) == child);
         counterMaps().get(&child->owner())->remove(identifier);
@@ skipping 170 matching lines @@
             fprintf(stderr, "    ");
         fprintf(stderr, "%p N:%p P:%p PS:%p NS:%p C:%p\n",
             current, current->node(), current->parent(), current->previousSibling(),
             current->nextSibling(), current->hasCounterNodeMap() ?
             counterName ? blink::counterMaps().get(current)->get(identifier) : (blink::CounterNode*)1 : (blink::CounterNode*)0);
     }
     fflush(stderr);
 }
 
 #endif // NDEBUG