Remove most content from Interpolation

third_party/WebKit/Source/core/animation/InterpolationEffectTest.cpp

Index: third_party/WebKit/Source/core/animation/InterpolationEffectTest.cpp
diff --git a/third_party/WebKit/Source/core/animation/InterpolationEffectTest.cpp b/third_party/WebKit/Source/core/animation/InterpolationEffectTest.cpp
index 5015f1ff4304338e8096a0cc5b59ef90f319b7d3..df2589377a9e912e3c76eaf8ddb2b420f4d2dc1e 100644
--- a/third_party/WebKit/Source/core/animation/InterpolationEffectTest.cpp
+++ b/third_party/WebKit/Source/core/animation/InterpolationEffectTest.cpp
@@ -4,6 +4,7 @@
 
 #include "core/animation/InterpolationEffect.h"
 
+#include "core/animation/LegacyStyleInterpolation.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include <memory>
 
@@ -11,7 +12,7 @@ namespace blink {
 
 namespace {
 
-class SampleInterpolation : public Interpolation {
+class SampleInterpolation : public LegacyStyleInterpolation {
  public:
   static PassRefPtr<Interpolation> create(
       std::unique_ptr<InterpolableValue> start,
@@ -19,14 +20,12 @@ class SampleInterpolation : public Interpolation {
     return adoptRef(new SampleInterpolation(std::move(start), std::move(end)));
   }
 
-  PropertyHandle getProperty() const override {
-    return PropertyHandle(CSSPropertyBackgroundColor);
-  }
-
  private:
   SampleInterpolation(std::unique_ptr<InterpolableValue> start,
                       std::unique_ptr<InterpolableValue> end)
-      : Interpolation(std::move(start), std::move(end)) {}
+      : LegacyStyleInterpolation(std::move(start),
+                                 std::move(end),
+                                 CSSPropertyBackgroundColor) {}
 };
 
 const double duration = 1.0;