Remove unused code in InvalidatableInterpolation

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/animation/InterpolationEffect.h"
 
 #include "core/animation/LegacyStyleInterpolation.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include <memory>
 
 namespace blink {
 
 namespace {
 
 class SampleInterpolation : public LegacyStyleInterpolation {
  public:
-  static PassRefPtr<Interpolation> create(
+  static PassRefPtr<LegacyStyleInterpolation> create(
       std::unique_ptr<InterpolableValue> start,
       std::unique_ptr<InterpolableValue> end) {
     return adoptRef(new SampleInterpolation(std::move(start), std::move(end)));
   }
 
  private:
   SampleInterpolation(std::unique_ptr<InterpolableValue> start,
                       std::unique_ptr<InterpolableValue> end)
       : LegacyStyleInterpolation(std::move(start),
                                  std::move(end),
                                  CSSPropertyBackgroundColor) {}
 };
 
 const double duration = 1.0;
 
 }  // namespace
 
 class AnimationInterpolationEffectTest : public ::testing::Test {
  protected:
-  InterpolableValue* interpolationValue(Interpolation& interpolation) {
+  InterpolableValue* interpolationValue(
+      LegacyStyleInterpolation& interpolation) {
     return interpolation.getCachedValueForTesting();
   }
 
   double getInterpolableNumber(PassRefPtr<Interpolation> value) {
-    return toInterpolableNumber(interpolationValue(*value.get()))->value();
+    LegacyStyleInterpolation& interpolation =
+        toLegacyStyleInterpolation(*value.get());
+    return toInterpolableNumber(interpolationValue(interpolation))->value();
   }
 };
 
 TEST_F(AnimationInterpolationEffectTest, SingleInterpolation) {
   InterpolationEffect interpolationEffect;
   interpolationEffect.addInterpolation(
       SampleInterpolation::create(InterpolableNumber::create(0),
                                   InterpolableNumber::create(10)),
       RefPtr<TimingFunction>(), 0, 1, -1, 2);
 
@@ skipping 74 matching lines @@
   EXPECT_EQ(1ul, activeInterpolations.size());
   EXPECT_FLOAT_EQ(12.5f, getInterpolableNumber(activeInterpolations.at(0)));
 
   interpolationEffect.getActiveInterpolations(2, duration,
                                               activeInterpolations);
   EXPECT_EQ(1ul, activeInterpolations.size());
   EXPECT_FLOAT_EQ(15, getInterpolableNumber(activeInterpolations.at(0)));
 }
 
 }  // namespace blink