Make PropertyReference value() return a const CSSValue&

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

Index: third_party/WebKit/Source/core/animation/KeyframeEffectTest.cpp
diff --git a/third_party/WebKit/Source/core/animation/KeyframeEffectTest.cpp b/third_party/WebKit/Source/core/animation/KeyframeEffectTest.cpp
index 00f2c285efb5956c335491dc6a8e525d5d9f22c7..8f7ae0cd3c5ae3cf802404a2085b3ff98a41691d 100644
--- a/third_party/WebKit/Source/core/animation/KeyframeEffectTest.cpp
+++ b/third_party/WebKit/Source/core/animation/KeyframeEffectTest.cpp
@@ -89,13 +89,11 @@ TEST_F(AnimationKeyframeEffectV8Test, CanCreateAnAnimation)
     EXPECT_EQ(0, keyframes[0]->offset());
     EXPECT_EQ(1, keyframes[1]->offset());
 
-    const CSSValue* keyframe1Width = toStringKeyframe(keyframes[0].get())->cssPropertyValue(CSSPropertyWidth);
-    const CSSValue* keyframe2Width = toStringKeyframe(keyframes[1].get())->cssPropertyValue(CSSPropertyWidth);
-    ASSERT(keyframe1Width);
-    ASSERT(keyframe2Width);
+    const CSSValue& keyframe1Width = toStringKeyframe(keyframes[0].get())->cssPropertyValue(CSSPropertyWidth);
+    const CSSValue& keyframe2Width = toStringKeyframe(keyframes[1].get())->cssPropertyValue(CSSPropertyWidth);
 
-    EXPECT_EQ("100px", keyframe1Width->cssText());
-    EXPECT_EQ("0px", keyframe2Width->cssText());
+    EXPECT_EQ("100px", keyframe1Width.cssText());
+    EXPECT_EQ("0px", keyframe2Width.cssText());
 
     EXPECT_EQ(*(CubicBezierTimingFunction::preset(CubicBezierTimingFunction::EaseType::EASE_IN_OUT)), keyframes[0]->easing());
     EXPECT_EQ(*(CubicBezierTimingFunction::create(1, 1, 0.3, 0.3).get()), keyframes[1]->easing());