CSSValue Immediates: Replace CSSPrimitiveValue usage with const references

Source/core/animation/LengthStyleInterpolation.cpp

Index: Source/core/animation/LengthStyleInterpolation.cpp
diff --git a/Source/core/animation/LengthStyleInterpolation.cpp b/Source/core/animation/LengthStyleInterpolation.cpp
index bc973808d28a07be77bf0178592ba2783e16f889..7ca8aa412904f545b38ac9561982d4339b4f69ec 100644
--- a/Source/core/animation/LengthStyleInterpolation.cpp
+++ b/Source/core/animation/LengthStyleInterpolation.cpp
@@ -54,7 +54,7 @@ bool pixelsForKeyword(CSSPropertyID property, CSSValueID valueID, double& result
 bool LengthStyleInterpolation::canCreateFrom(const CSSValue value, CSSPropertyID property)
 {
     if (value.isPrimitiveValue()) {
-        const CSSPrimitiveValue primitiveValue = toCSSPrimitiveValue(value);
+        const CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(value);
         if (primitiveValue.cssCalcValue())
             return true;
 
@@ -71,14 +71,14 @@ bool LengthStyleInterpolation::canCreateFrom(const CSSValue value, CSSPropertyID
     return value.isCalcValue();
 }
 
-PassOwnPtrWillBeRawPtr<InterpolableValue> LengthStyleInterpolation::toInterpolableValue(const CSSValue value, CSSPropertyID id)
+PassOwnPtrWillBeRawPtr<InterpolableValue> LengthStyleInterpolation::toInterpolableValue(const CSSValue& value, CSSPropertyID id)
 {
     ASSERT(canCreateFrom(value, id));
     OwnPtrWillBeRawPtr<InterpolableList> listOfValuesAndTypes = InterpolableList::create(2);
     OwnPtrWillBeRawPtr<InterpolableList> listOfValues = InterpolableList::create(CSSPrimitiveValue::LengthUnitTypeCount);
     OwnPtrWillBeRawPtr<InterpolableList> listOfTypes = InterpolableList::create(CSSPrimitiveValue::LengthUnitTypeCount);
 
-    const CSSPrimitiveValue primitive = toCSSPrimitiveValue(value);
+    const CSSPrimitiveValue& primitive = toCSSPrimitiveValue(value);
 
     CSSLengthArray arrayOfValues;
     CSSPrimitiveValue::CSSLengthTypeArray arrayOfTypes;