Proactively dispose image filters for SVG filter chains

third_party/WebKit/Source/platform/graphics/filters/FilterEffect.h

 /*
  * Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2013 Google Inc. 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 38 matching lines @@
 };
 
 class PLATFORM_EXPORT FilterEffect
     : public GarbageCollectedFinalized<FilterEffect> {
   WTF_MAKE_NONCOPYABLE(FilterEffect);
 
  public:
   virtual ~FilterEffect();
   DECLARE_VIRTUAL_TRACE();
 
-  void ClearResult();
+  void DisposeImageFilters();
+  void DisposeImageFiltersRecursive();
 
   FilterEffectVector& InputEffects() { return input_effects_; }
   FilterEffect* InputEffect(unsigned) const;
   unsigned NumberOfEffectInputs() const { return input_effects_.size(); }
 
   inline bool HasImageFilter() const {
     return image_filters_[0] || image_filters_[1] || image_filters_[2] ||
            image_filters_[3];
   }
 
@@ skipping 90 matching lines @@
   bool origin_tainted_;
 
   ColorSpace operating_color_space_;
 
   sk_sp<SkImageFilter> image_filters_[4];
 };
 
 }  // namespace blink
 
 #endif  // FilterEffect_h