Only communicate CSSPrimitiveValue references from SVGLength

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

 // Copyright 2015 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/SVGLengthInterpolationType.h"
 
 #include "core/animation/InterpolationEnvironment.h"
 #include "core/animation/StringKeyframe.h"
 #include "core/css/CSSHelper.h"
 #include "core/svg/SVGElement.h"
 #include "core/svg/SVGLength.h"
 #include "core/svg/SVGLengthContext.h"
 #include <memory>
 
 namespace blink {
 
 std::unique_ptr<InterpolableValue>
 SVGLengthInterpolationType::neutralInterpolableValue() {
   std::unique_ptr<InterpolableList> listOfValues =
       InterpolableList::create(CSSPrimitiveValue::LengthUnitTypeCount);
   for (size_t i = 0; i < CSSPrimitiveValue::LengthUnitTypeCount; ++i)
     listOfValues->set(i, InterpolableNumber::create(0));
 
   return std::move(listOfValues);
 }
 
 InterpolationValue SVGLengthInterpolationType::convertSVGLength(
     const SVGLength& length) {
-  const CSSPrimitiveValue* primitiveValue = length.asCSSPrimitiveValue();
+  const CSSPrimitiveValue& primitiveValue = length.asCSSPrimitiveValue();
 
   CSSLengthArray lengthArray;
-  primitiveValue->accumulateLengthArray(lengthArray);
+  primitiveValue.accumulateLengthArray(lengthArray);
 
   std::unique_ptr<InterpolableList> listOfValues =
       InterpolableList::create(CSSPrimitiveValue::LengthUnitTypeCount);
   for (size_t i = 0; i < CSSPrimitiveValue::LengthUnitTypeCount; ++i)
     listOfValues->set(i, InterpolableNumber::create(lengthArray.values[i]));
 
   return InterpolationValue(std::move(listOfValues));
 }
 
 SVGLength* SVGLengthInterpolationType::resolveInterpolableSVGLength(
@@ skipping 72 matching lines @@
     InterpolationEnvironment& environment) const {
   SVGElement& element = environment.svgElement();
   SVGLengthContext lengthContext(&element);
   element.setWebAnimatedAttribute(
       attribute(),
       resolveInterpolableSVGLength(interpolableValue, lengthContext, m_unitMode,
                                    m_negativeValuesForbidden));
 }
 
 }  // namespace blink