[wip] unprefix filter

third_party/WebKit/Source/core/paint/PaintLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 2669 matching lines @@
         current->removeAncestorOverflowLayer(removedLayer);
         current = current->nextSibling();
     }
 }
 
 void PaintLayer::updateOrRemoveFilterClients()
 {
     const auto& filter = layoutObject()->style()->filter();
     if (filter.isEmpty() && m_rareData) {
         m_rareData->filterInfo = nullptr;
-    } else if (filter.hasReferenceFilter()) {
+    } else if (filter.hasReferenceFilter() && !layoutObject()->isSVGRoot()) {
         ensureFilterInfo().updateReferenceFilterClients(filter);
     } else if (filterInfo()) {
         filterInfo()->clearFilterReferences();
     }
 }
 
 FilterEffectBuilder* PaintLayer::updateFilterEffectBuilder() const
 {
     // TODO(chrishtr): ensure (and assert) that compositing is clean here.
 
@@ skipping 202 matching lines @@
 
 void showLayerTree(const blink::LayoutObject* layoutObject)
 {
     if (!layoutObject) {
         fprintf(stderr, "Cannot showLayerTree. Root is (nil)\n");
         return;
     }
     showLayerTree(layoutObject->enclosingLayer());
 }
 #endif