blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/animation/ListInterpolationFunctions.h

 // Copyright 2015 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.
 
 #ifndef ListInterpolationFunctions_h
 #define ListInterpolationFunctions_h
 
 #include "core/animation/InterpolationValue.h"
 #include "core/animation/PairwiseInterpolationValue.h"
 #include "wtf/Vector.h"
 #include <memory>
 
 namespace blink {
 
-class CSSValueList;
 class UnderlyingValueOwner;
 class InterpolationType;
 
 class ListInterpolationFunctions {
  public:
   template <typename CreateItemCallback>
   static InterpolationValue createList(size_t length, CreateItemCallback);
   static InterpolationValue createEmptyList() {
     return InterpolationValue(InterpolableList::create(0));
   }
@@ skipping 77 matching lines @@
     nonInterpolableValues[i] = item.nonInterpolableValue.release();
   }
   return InterpolationValue(
       std::move(interpolableList),
       NonInterpolableList::create(std::move(nonInterpolableValues)));
 }
 
 }  // namespace blink
 
 #endif  // ListInterpolationFunctions_h