Proactively dispose image filters for SVG filter chains

third_party/WebKit/Source/core/svg/graphics/filters/SVGFilterBuilder.cpp

 /*
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.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
@@ skipping 75 matching lines @@
   // reason, which in turn mean that certain types of invalidation will not
   // work (the LayoutObject -> FilterEffect mapping will not be defined).
   if (object)
     effect_renderer_.insert(object, effect);
 }
 
 void SVGFilterGraphNodeMap::InvalidateDependentEffects(FilterEffect* effect) {
   if (!effect->HasImageFilter())
     return;
 
-  effect->ClearResult();
+  effect->DisposeImageFilters();
 
   FilterEffectSet& effect_references = this->EffectReferences(effect);
   for (FilterEffect* effect_reference : effect_references)
     InvalidateDependentEffects(effect_reference);
 }
 
 DEFINE_TRACE(SVGFilterGraphNodeMap) {
   visitor->Trace(effect_renderer_);
   visitor->Trace(effect_references_);
 }
@@ skipping 114 matching lines @@
       return named_effect;
   }
 
   if (last_effect_)
     return last_effect_.Get();
 
   return builtin_effects_.at(FilterInputKeywords::GetSourceGraphic());
 }
 
 }  // namespace blink