Begin tracking why layout is invalidated

Source/core/svg/SVGFilterElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. 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 111 matching lines @@
 }
 
 void SVGFilterElement::childrenChanged(const ChildrenChange& change)
 {
     SVGElement::childrenChanged(change);
 
     if (change.byParser)
         return;
 
     if (LayoutObject* object = layoutObject())
-        object->setNeedsLayoutAndFullPaintInvalidation();
+        object->setNeedsLayoutAndFullPaintInvalidation(LayoutInvalidationReason::ChildChanged);
 }
 
 LayoutObject* SVGFilterElement::createLayoutObject(const ComputedStyle&)
 {
     LayoutSVGResourceFilter* renderer = new LayoutSVGResourceFilter(this);
 
     for (const RefPtrWillBeMember<Node>& node : m_clientsToAdd)
         renderer->addClientLayer(node.get());
     m_clientsToAdd.clear();
 
@@ skipping 14 matching lines @@
     m_clientsToAdd.add(client);
 }
 
 void SVGFilterElement::removeClient(Node* client)
 {
     ASSERT(client);
     m_clientsToAdd.remove(client);
 }
 
 } // namespace blink