Tracking filter mutation via SVGElementProxy

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

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
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 #include "core/paint/FilterEffectBuilder.h"
 
-#include "core/layout/svg/ReferenceFilterBuilder.h"
 #include "core/style/FilterOperations.h"
+#include "core/svg/SVGElementProxy.h"
 #include "core/svg/SVGFilterElement.h"
 #include "core/svg/SVGLengthContext.h"
 #include "core/svg/graphics/filters/SVGFilterBuilder.h"
 #include "platform/LengthFunctions.h"
 #include "platform/graphics/ColorSpace.h"
 #include "platform/graphics/CompositorFilterOperations.h"
 #include "platform/graphics/filters/FEBoxReflect.h"
 #include "platform/graphics/filters/FEColorMatrix.h"
 #include "platform/graphics/filters/FEComponentTransfer.h"
 #include "platform/graphics/filters/FEDropShadow.h"
@@ skipping 355 matching lines @@
     sk_sp<SkImageFilter> filter = SkiaImageFilterBuilder::transformColorSpace(
         nullptr, currentColorSpace, ColorSpaceDeviceRGB);
     filters.appendReferenceFilter(std::move(filter));
   }
   return filters;
 }
 
 Filter* FilterEffectBuilder::buildReferenceFilter(
     const ReferenceFilterOperation& referenceOperation,
     FilterEffect* previousEffect) const {
-  DCHECK(m_targetContext && m_targetContext->isElementNode());
-  SVGFilterElement* filterElement =
-      ReferenceFilterBuilder::resolveFilterReference(
-          referenceOperation, toElement(*m_targetContext));
-  if (!filterElement)
+  DCHECK(m_targetContext);
+  Element* filterElement =
+      referenceOperation.elementProxy().element(m_targetContext->treeScope());
+  if (!isSVGFilterElement(filterElement))
     return nullptr;
-  return buildReferenceFilter(*filterElement, previousEffect);
+  return buildReferenceFilter(toSVGFilterElement(*filterElement),
+                              previousEffect);
 }
 
 Filter* FilterEffectBuilder::buildReferenceFilter(
     SVGFilterElement& filterElement,
     FilterEffect* previousEffect,
     SVGFilterGraphNodeMap* nodeMap) const {
   FloatRect filterRegion = SVGLengthContext::resolveRectangle<SVGFilterElement>(
       &filterElement, filterElement.filterUnits()->currentValue()->enumValue(),
       m_referenceBox);
   // TODO(fs): We rely on the presence of a node map here to opt-in to the
@@ skipping 11 matching lines @@
       Filter::create(m_referenceBox, filterRegion, m_zoom, unitScaling);
   if (!previousEffect)
     previousEffect = result->getSourceGraphic();
   SVGFilterBuilder builder(previousEffect, nodeMap, m_fillPaint, m_strokePaint);
   builder.buildGraph(result, filterElement, m_referenceBox);
   result->setLastEffect(builder.lastEffect());
   return result;
 }
 
 }  // namespace blink