Refactor SMIL animation value updates

third_party/WebKit/Source/core/svg/SVGAnimateElement.h

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. 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 14 matching lines @@
 
 #include "core/CoreExport.h"
 #include "core/SVGNames.h"
 #include "core/svg/SVGAnimatedTypeAnimator.h"
 #include "core/svg/SVGAnimationElement.h"
 #include "platform/heap/Handle.h"
 #include <base/gtest_prod_util.h>
 
 namespace blink {
 
-class SVGAnimatedTypeAnimator;
+// The size of SVGElementInstances is 1 unless there is a <use> instance of the element.
+using SVGElementInstances = HeapVector<Member<SVGElement>, 1u>;
 
 class CORE_EXPORT SVGAnimateElement : public SVGAnimationElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static SVGAnimateElement* create(Document&);
     ~SVGAnimateElement() override;
 
     DECLARE_VIRTUAL_TRACE();
 
     bool isSVGAnimationAttributeSettingJavaScriptURL(const Attribute&) const override;
@@ skipping 40 matching lines @@
     return element.hasTagName(SVGNames::animateTag)
         || element.hasTagName(SVGNames::animateTransformTag)
         || element.hasTagName(SVGNames::setTag);
 }
 
 DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGAnimateElement);
 
 } // namespace blink
 
 #endif // SVGAnimateElement_h