Make InterpolationEnvironment virutal

third_party/WebKit/Source/core/svg/SVGElement.cpp

Index: third_party/WebKit/Source/core/svg/SVGElement.cpp
diff --git a/third_party/WebKit/Source/core/svg/SVGElement.cpp b/third_party/WebKit/Source/core/svg/SVGElement.cpp
index 7b4e56a8a23972bcac4f9cb85c3c094d1bd6504e..d3bc529629a60b78adc16a40a1987ad3abc492b7 100644
--- a/third_party/WebKit/Source/core/svg/SVGElement.cpp
+++ b/third_party/WebKit/Source/core/svg/SVGElement.cpp
@@ -31,8 +31,8 @@
 #include "core/animation/DocumentAnimations.h"
 #include "core/animation/EffectStack.h"
 #include "core/animation/ElementAnimations.h"
-#include "core/animation/InterpolationEnvironment.h"
 #include "core/animation/InvalidatableInterpolation.h"
+#include "core/animation/SVGInterpolationEnvironment.h"
 #include "core/animation/SVGInterpolationTypesMap.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/Document.h"
@@ -214,7 +214,7 @@ void SVGElement::ApplyActiveWebAnimations() {
   for (auto& entry : active_interpolations_map) {
     const QualifiedName& attribute = entry.key.SvgAttribute();
     SVGInterpolationTypesMap map;
-    InterpolationEnvironment environment(
+    SVGInterpolationEnvironment environment(
         map, *this, PropertyFromAttribute(attribute)->BaseValueBase());
     InvalidatableInterpolation::ApplyStack(entry.value, environment);
   }