CSSValue Immediates: Make CSSPrimitiveValue a container

Source/core/animation/DoubleStyleInterpolation.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/DoubleStyleInterpolation.h"
 
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/resolver/StyleBuilder.h"
 
 namespace blink {
 
 bool DoubleStyleInterpolation::canCreateFrom(const CSSValue& value)
 {
     return value.isPrimitiveValue() && (toCSSPrimitiveValue(value).isNumber() || toCSSPrimitiveValue(value).isAngle());
 }
 
 PassOwnPtrWillBeRawPtr<InterpolableValue> DoubleStyleInterpolation::doubleToInterpolableValue(const CSSValue& value)
 {
     ASSERT(canCreateFrom(value));
-    const CSSPrimitiveValue& primitive = toCSSPrimitiveValue(value);
+    const CSSPrimitiveValue primitive = toCSSPrimitiveValue(value);
     if (primitive.isNumber())
         return InterpolableNumber::create(primitive.getDoubleValue());
     if (primitive.isAngle())
         return InterpolableNumber::create(primitive.computeDegrees());
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 static double clampToRange(double value, InterpolationRange clamp)
 {
@@ skipping 66 matching lines @@
 
     if (!value.isValueList())
         return false;
     const CSSValueList& list = toCSSValueList(value);
 
     int len = list.length();
     for (int i = 0; i < len; i++) {
         const CSSValue item = list.item(i);
         if (!item.isPrimitiveValue())
             return false;
-        const CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(item);
+        const CSSPrimitiveValue primitiveValue = toCSSPrimitiveValue(item);
         if (primitiveValue.getValueID() == CSSValueAuto) {
             *rotationType = MotionRotationAuto;
         } else if (primitiveValue.getValueID() == CSSValueReverse) {
             *rotationType = MotionRotationAuto;
             *rotation += 180;
         } else if (primitiveValue.isAngle()) {
             *rotation += primitiveValue.computeDegrees();
         } else {
             return false;
         }
@@ skipping 32 matching lines @@
         || startRotationType != endRotationType)
         return nullptr;
 
     return adoptRefWillBeNoop(new DoubleStyleInterpolation(
         motionRotationToInterpolableValue(start),
         motionRotationToInterpolableValue(end),
         id, true, InterpolationRange::RangeAll, startRotationType == MotionRotationAuto));
 }
 
 }