Delete unused AnimatableValue code

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

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/animation/animatable/AnimatableShadow.h"
 
 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 ||
          (m_shadowList && shadowList && *m_shadowList == *shadowList);
 }
 
 }  // namespace blink