Remove unused AnimatableValue types

third_party/WebKit/Source/core/animation/animatable/AnimatableUnknown.h

 /*
  * 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 41 matching lines @@
   CSSValueID ToCSSValueID() const {
     return ToCSSIdentifierValue(value_.Get())->GetValueID();
   }
 
  protected:
   PassRefPtr<AnimatableValue> InterpolateTo(const AnimatableValue* value,
                                             double fraction) const override {
     return DefaultInterpolateTo(this, value, fraction);
   }
 
-  bool UsesDefaultInterpolationWith(const AnimatableValue*) const override;
-
  private:
   explicit AnimatableUnknown(const CSSValue* value) : value_(value) {}
   AnimatableType GetType() const override { return kTypeUnknown; }
-  bool EqualTo(const AnimatableValue*) const override;
 
   const Persistent<const CSSValue> value_;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableUnknown, IsUnknown());
 
-inline bool AnimatableUnknown::EqualTo(const AnimatableValue* value) const {
-  const AnimatableUnknown* unknown = ToAnimatableUnknown(value);
-  return DataEquivalent(value_, unknown->value_);
-}
-
-inline bool AnimatableUnknown::UsesDefaultInterpolationWith(
-    const AnimatableValue* value) const {
-  return !EqualTo(value);
-}
-
 }  // namespace blink
 
 #endif  // AnimatableUnknown_h