Delete unused AnimatableValue code

third_party/WebKit/Source/core/animation/animatable/AnimatableLengthSize.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/AnimatableLengthSize.h"
 
 namespace blink {
 
-PassRefPtr<AnimatableValue> AnimatableLengthSize::interpolateTo(
-    const AnimatableValue* value,
-    double fraction) const {
-  const AnimatableLengthSize* lengthSize = toAnimatableLengthSize(value);
-  return AnimatableLengthSize::create(
-      AnimatableValue::interpolate(this->width(), lengthSize->width(),
-                                   fraction),
-      AnimatableValue::interpolate(this->height(), lengthSize->height(),
-                                   fraction));
-}
-
 bool AnimatableLengthSize::equalTo(const AnimatableValue* value) const {
   const AnimatableLengthSize* lengthSize = toAnimatableLengthSize(value);
-  return width()->equals(lengthSize->width()) &&
-         height()->equals(lengthSize->height());
-}
-
-bool AnimatableLengthSize::usesDefaultInterpolationWith(
-    const AnimatableValue* other) const {
-  const AnimatableLengthSize* lengthSize = toAnimatableLengthSize(other);
-  return usesDefaultInterpolation(width(), lengthSize->width()) ||
-         usesDefaultInterpolation(height(), lengthSize->height());
+  return m_width->equals(lengthSize->m_width.get()) &&
+         m_height->equals(lengthSize->m_height.get());
 }
 
 }  // namespace blink