[Oilpan] Migrate most classes under core/animations to Oilpan heap.

Source/core/animation/InterpolableValue.cpp

 // 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.
 
 #include "config.h"
 #include "core/animation/InterpolableValue.h"
 
 namespace blink {
 
-DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(InterpolableValue);
-
 void InterpolableNumber::interpolate(const InterpolableValue &to, const double progress, InterpolableValue& result) const
 {
     const InterpolableNumber& toNumber = toInterpolableNumber(to);
     InterpolableNumber& resultNumber = toInterpolableNumber(result);
 
     if (progress == 0 || m_value == toNumber.m_value)
         resultNumber.m_value = m_value;
     else if (progress == 1)
         resultNumber.m_value = toNumber.m_value;
     else
@@ skipping 56 matching lines @@
     resultValue.m_value = AnimatableValue::interpolate(m_value.get(), toValue.m_value.get(), progress);
 }
 
 DEFINE_TRACE(InterpolableAnimatableValue)
 {
     visitor->trace(m_value);
     InterpolableValue::trace(visitor);
 }
 
 }