Lock animated property type of result animation during processing

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 35 matching lines @@
     bool isSVGAnimationAttributeSettingJavaScriptURL(const Attribute&) const override;
 
     AnimatedPropertyType animatedPropertyType();
     bool animatedPropertyTypeSupportsAddition();
 
     static SVGElementInstances findElementInstances(SVGElement* targetElement);
 
 protected:
     SVGAnimateElement(const QualifiedName&, Document&);
 
+    void lockAnimatedType() final { DCHECK(!m_animatedPropertyLocked); m_animatedPropertyLocked = true; }
+    void unlockAnimatedType() final { DCHECK(m_animatedPropertyLocked); m_animatedPropertyLocked = false; }
+
     void resetAnimatedType() final;
     void clearAnimatedType() final;
 
     bool calculateToAtEndOfDurationValue(const String& toAtEndOfDurationString) final;
     bool calculateFromAndToValues(const String& fromString, const String& toString) final;
     bool calculateFromAndByValues(const String& fromString, const String& byString) final;
     void calculateAnimatedValue(float percentage, unsigned repeatCount, SVGSMILElement* resultElement) final;
     void applyResultsToTarget() final;
     float calculateDistance(const String& fromString, const String& toString) final;
     bool isAdditive() final;
 
     void setTargetElement(SVGElement*) final;
     void setAttributeName(const QualifiedName&) final;
 
     FRIEND_TEST_ALL_PREFIXES(UnsafeSVGAttributeSanitizationTest, stringsShouldNotSupportAddition);
 
 private:
     void resetAnimatedPropertyType();
 
     bool hasValidAttributeType() override;
 
     Member<SVGPropertyBase> m_fromProperty;
     Member<SVGPropertyBase> m_toProperty;
     Member<SVGPropertyBase> m_toAtEndOfDurationProperty;
     Member<SVGPropertyBase> m_animatedProperty;
 
     SVGAnimatedTypeAnimator m_animator;
+
+    bool m_animatedPropertyLocked;
 };
 
 inline bool isSVGAnimateElement(const SVGElement& element)
 {
     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