CSSValue Immediates: Replace CSSValue usage with const references

Source/core/animation/ListStyleInterpolationTest.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 "config.h"
 #include "core/animation/ListStyleInterpolation.h"
 
 #include "core/animation/LengthStyleInterpolation.h"
 #include "core/animation/ShadowStyleInterpolation.h"
 
 #include <gtest/gtest.h>
 
 namespace blink {
 
 class ListStyleInterpolationTest : public ::testing::Test {
 
 protected:
     static CSSValue lengthRoundTrip(CSSValue value, InterpolationRange range)
     {
         return ListStyleInterpolationImpl<LengthStyleInterpolation, void>::interpolableValueToList(
             ListStyleInterpolationImpl<LengthStyleInterpolation, void>::listToInterpolableValue(toCSSValueList(value)).get(), range);
     }
 
     static void compareLengthLists(PassRefPtrWillBeRawPtr<CSSValueList> expectedList, CSSValue actualList)
     {
         ASSERT(actualList.isValueList());
 
         for (size_t i = 0; i < 10; i++) {
-            CSSValue currentExpectedValue = expectedList->item(i);
-            CSSValue currentActualValue = toCSSValueList(actualList).item(i);
+            const CSSValue& currentExpectedValue = expectedList->item(i);
+            const CSSValue& currentActualValue = toCSSValueList(actualList).item(i);
             ASSERT(currentExpectedValue.isPrimitiveValue());
             ASSERT(currentActualValue.isPrimitiveValue());
 
             EXPECT_EQ(toCSSPrimitiveValue(currentExpectedValue).getDoubleValue(), toCSSPrimitiveValue(currentActualValue).getDoubleValue());
             EXPECT_EQ(toCSSPrimitiveValue(currentExpectedValue).getDoubleValue(), toCSSPrimitiveValue(currentActualValue).getDoubleValue());
         }
     }
 
     static CSSValue shadowRoundTrip(CSSValue value)
     {
@@ skipping 50 matching lines @@
     RefPtrWillBeRawPtr<CSSValueList> expectedList = CSSValueList::createCommaSeparated();
     RefPtrWillBeRawPtr<CSSShadowValue> shadowValue = createShadowValue();
     for (size_t i = 0; i < 10; i++) {
         expectedList->append(shadowValue);
     }
 
     compareShadowList(expectedList, shadowRoundTrip(expectedList));
 }
 
 } // namespace blink