Delete unused AnimatableValue code

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

 // 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.
 
 #ifndef AnimatableDoubleAndBool_h
 #define AnimatableDoubleAndBool_h
 
 #include "core/CoreExport.h"
 #include "core/animation/animatable/AnimatableValue.h"
 
 namespace blink {
 
-class CORE_EXPORT AnimatableDoubleAndBool final : public AnimatableValue {
+class AnimatableDoubleAndBool final : public AnimatableValue {
  public:
   ~AnimatableDoubleAndBool() override {}
   static PassRefPtr<AnimatableDoubleAndBool> create(double number, bool flag) {
     return adoptRef(new AnimatableDoubleAndBool(number, flag));
   }
 
-  double toDouble() const { return m_number; }
-  bool flag() const { return m_flag; }
-
- protected:
-  PassRefPtr<AnimatableValue> interpolateTo(const AnimatableValue*,
-                                            double fraction) const override;
-  bool usesDefaultInterpolationWith(const AnimatableValue*) const override;
-
  private:
   AnimatableDoubleAndBool(double number, bool flag)
       : m_number(number), m_flag(flag) {}
   AnimatableType type() const override { return TypeDoubleAndBool; }
   bool equalTo(const AnimatableValue*) const override;
 
   double m_number;
   bool m_flag;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableDoubleAndBool, isDoubleAndBool());
 
 }  // namespace blink
 
 #endif  // AnimatableDoubleAndBool_h