Reland of "Tracking reference filter mutation via SVGElementProxy"

third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp

 /*
  * Copyright (C) 2006 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007 Rob Buis <buis@kde.org>
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "core/svg/SVGDocumentExtensions.h"
 
 #include "core/dom/Document.h"
 #include "core/inspector/ConsoleMessage.h"
-#include "core/layout/svg/SVGResourcesCache.h"
 #include "core/svg/SVGSVGElement.h"
 #include "core/svg/animation/SMILTimeContainer.h"
 #include "wtf/AutoReset.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 SVGDocumentExtensions::SVGDocumentExtensions(Document* document)
     : m_document(document)
 #if ENABLE(ASSERT)
@@ skipping 261 matching lines @@
 
 DEFINE_TRACE(SVGDocumentExtensions) {
   visitor->trace(m_document);
   visitor->trace(m_timeContainers);
   visitor->trace(m_webAnimationsPendingSVGElements);
   visitor->trace(m_relativeLengthSVGRoots);
   visitor->trace(m_pendingResources);
 }
 
 }  // namespace blink