CSSValue Immediates: Replace CSSValue usage with const references

Source/core/animation/DoubleStyleInterpolationTest.cpp

Index: Source/core/animation/DoubleStyleInterpolationTest.cpp
diff --git a/Source/core/animation/DoubleStyleInterpolationTest.cpp b/Source/core/animation/DoubleStyleInterpolationTest.cpp
index 7eba8236a4487fd1de6e539a3eede65e9a1741f6..5dfe0b1f37656631c24e936b10290f1316dd2391 100644
--- a/Source/core/animation/DoubleStyleInterpolationTest.cpp
+++ b/Source/core/animation/DoubleStyleInterpolationTest.cpp
@@ -81,7 +81,7 @@ protected:
 
 TEST_F(AnimationDoubleStyleInterpolationTest, ZeroValue)
 {
-    CSSValue value = roundTrip(CSSPrimitiveValue::create(0, CSSPrimitiveValue::CSS_NUMBER));
+    const CSSValue& value = roundTrip(CSSPrimitiveValue::create(0, CSSPrimitiveValue::CSS_NUMBER));
     testPrimitiveValue(value, 0, CSSPrimitiveValue::CSS_NUMBER);
 }
 
@@ -114,7 +114,7 @@ TEST_F(AnimationDoubleStyleInterpolationTest, ZeroValueFixedMotionRotation)
 {
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
     list->append(CSSPrimitiveValue::create(0, CSSPrimitiveValue::CSS_DEG));
-    CSSValue value = roundTripMotionRotation(list.release(), false);
+    const CSSValue& value = roundTripMotionRotation(list.release(), false);
     testValueListMotionRotation(value, 0, false);
 }
 
@@ -123,7 +123,7 @@ TEST_F(AnimationDoubleStyleInterpolationTest, ZeroValueAutoMotionRotation)
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
     list->append(CSSPrimitiveValue::createIdentifier(CSSValueAuto));
     list->append(CSSPrimitiveValue::create(0, CSSPrimitiveValue::CSS_DEG));
-    CSSValue value = roundTripMotionRotation(list.release(), true);
+    const CSSValue& value = roundTripMotionRotation(list.release(), true);
     testValueListMotionRotation(value, 0, true);
 }
 
@@ -131,7 +131,7 @@ TEST_F(AnimationDoubleStyleInterpolationTest, ValueFixedMotionRotation)
 {
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
     list->append(CSSPrimitiveValue::create(90, CSSPrimitiveValue::CSS_DEG));
-    CSSValue value = roundTripMotionRotation(list.release(), false);
+    const CSSValue& value = roundTripMotionRotation(list.release(), false);
     testValueListMotionRotation(value, 90, false);
 }
 
@@ -140,7 +140,7 @@ TEST_F(AnimationDoubleStyleInterpolationTest, ValueAutoMotionRotation)
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
     list->append(CSSPrimitiveValue::createIdentifier(CSSValueAuto));
     list->append(CSSPrimitiveValue::create(90, CSSPrimitiveValue::CSS_DEG));
-    CSSValue value = roundTripMotionRotation(list.release(), true);
+    const CSSValue& value = roundTripMotionRotation(list.release(), true);
     testValueListMotionRotation(value, 90, true);
 }