Delete unused AnimatableValue code

third_party/WebKit/Source/core/animation/animatable/AnimatableShadow.cpp

Index: third_party/WebKit/Source/core/animation/animatable/AnimatableShadow.cpp
diff --git a/third_party/WebKit/Source/core/animation/animatable/AnimatableShadow.cpp b/third_party/WebKit/Source/core/animation/animatable/AnimatableShadow.cpp
index f29eec59d9e282adae1c6346f8393caacbacb5c6..cd9dadc95d01b0ff355b234c89fd5e585057fb43 100644
--- a/third_party/WebKit/Source/core/animation/animatable/AnimatableShadow.cpp
+++ b/third_party/WebKit/Source/core/animation/animatable/AnimatableShadow.cpp
@@ -32,38 +32,6 @@
 
 namespace blink {
 
-PassRefPtr<AnimatableValue> AnimatableShadow::interpolateTo(
-    const AnimatableValue* value,
-    double fraction) const {
-  if (usesDefaultInterpolationWith(value))
-    return defaultInterpolateTo(this, value, fraction);
-
-  const AnimatableShadow* shadowList = toAnimatableShadow(value);
-  return AnimatableShadow::create(
-      ShadowList::blend(m_shadowList.get(), shadowList->m_shadowList.get(),
-                        fraction, m_currentColor),
-      m_currentColor);
-}
-
-bool AnimatableShadow::usesDefaultInterpolationWith(
-    const AnimatableValue* value) const {
-  const AnimatableShadow* target = toAnimatableShadow(value);
-  if (!m_shadowList || !target->m_shadowList)
-    return false;
-
-  size_t minLength = std::min(m_shadowList->shadows().size(),
-                              target->m_shadowList->shadows().size());
-  for (size_t i = 0; i < minLength; ++i) {
-    ShadowStyle fromShadowStyle = m_shadowList->shadows()[i].style();
-    ShadowStyle toShadowStyle = target->m_shadowList->shadows()[i].style();
-
-    if (fromShadowStyle != toShadowStyle)
-      return true;
-  }
-
-  return false;
-}
-
 bool AnimatableShadow::equalTo(const AnimatableValue* value) const {
   const ShadowList* shadowList = toAnimatableShadow(value)->m_shadowList.get();
   return m_shadowList == shadowList ||