Componentization: make FilterStyleInterpolation visible for AnimationFilterStyleInterpolationTest

Source/core/animation/FilterStyleInterpolation.h

Index: Source/core/animation/FilterStyleInterpolation.h
diff --git a/Source/core/animation/FilterStyleInterpolation.h b/Source/core/animation/FilterStyleInterpolation.h
index 9e626d14745e72b68b585e0c1f792f08c744bf54..4d5624097793f3feb6a43a33b7162bee7ca6d2ee 100644
--- a/Source/core/animation/FilterStyleInterpolation.h
+++ b/Source/core/animation/FilterStyleInterpolation.h
@@ -5,12 +5,13 @@
 #ifndef FilterStyleInterpolation_h
 #define FilterStyleInterpolation_h
 
+#include "core/CoreExport.h"
 #include "core/animation/ListStyleInterpolation.h"
 #include "core/css/CSSFunctionValue.h"
 
 namespace blink {
 
-class FilterStyleInterpolation : public StyleInterpolation {
+class CORE_EXPORT FilterStyleInterpolation : public StyleInterpolation {
 public:
     typedef CSSValueID NonInterpolableType;
     typedef ListStyleInterpolationImpl<FilterStyleInterpolation, NonInterpolableType> FilterListStyleInterpolation;