Remove most content from Interpolation

third_party/WebKit/Source/core/animation/LegacyStyleInterpolation.cpp

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2017 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 "core/animation/Interpolation.h"
+#include "core/animation/LegacyStyleInterpolation.h"
 
 #include <memory>
 
 namespace blink {
 
 namespace {
 
 bool typesMatch(const InterpolableValue* start, const InterpolableValue* end) {
   if (start == end)
     return true;
@@ skipping 11 matching lines @@
     return false;
   for (size_t i = 0; i < startList->length(); ++i) {
     if (!typesMatch(startList->get(i), endList->get(i)))
       return false;
   }
   return true;
 }
 
 }  // namespace
 
-Interpolation::Interpolation(std::unique_ptr<InterpolableValue> start,
-                             std::unique_ptr<InterpolableValue> end)
-    : m_start(std::move(start)),
+LegacyStyleInterpolation::LegacyStyleInterpolation(
+    std::unique_ptr<InterpolableValue> start,
+    std::unique_ptr<InterpolableValue> end,
+    CSSPropertyID id)
+    : Interpolation(),
+      m_start(std::move(start)),
       m_end(std::move(end)),
+      m_id(id),
       m_cachedFraction(0),
       m_cachedIteration(0),
       m_cachedValue(m_start ? m_start->clone() : nullptr) {
   RELEASE_ASSERT(typesMatch(m_start.get(), m_end.get()));
 }
 
-Interpolation::~Interpolation() {}
-
-void Interpolation::interpolate(int iteration, double fraction) {
+void LegacyStyleInterpolation::interpolate(int iteration, double fraction) {
   if (m_cachedFraction != fraction || m_cachedIteration != iteration) {
     m_start->interpolate(*m_end, fraction, *m_cachedValue);
     m_cachedIteration = iteration;
     m_cachedFraction = fraction;
   }
 }
 
 }  // namespace blink