Lock animated property type of result animation during processing

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

Index: third_party/WebKit/Source/core/svg/SVGDiscardElement.h
diff --git a/third_party/WebKit/Source/core/svg/SVGDiscardElement.h b/third_party/WebKit/Source/core/svg/SVGDiscardElement.h
index 76b61d8cc55381b4fcaddc4303bdc5e3aee7c0be..7271b663090d058ab3e7f5ba9ff895655c29aa56 100644
--- a/third_party/WebKit/Source/core/svg/SVGDiscardElement.h
+++ b/third_party/WebKit/Source/core/svg/SVGDiscardElement.h
@@ -47,6 +47,8 @@ private:
     void resetAnimatedType() override { }
     void clearAnimatedType() override { }
     void applyResultsToTarget() override { }
+    void lockAnimatedType() override { }
+    void unlockAnimatedType() override { }
     bool hasValidAttributeType() override;
     bool hasValidAttributeName() override;
     void animationAttributeChanged() override { }