Simplify animation/transition parsing slightly

Source/core/animation/css/CSSAnimations.cpp

Index: Source/core/animation/css/CSSAnimations.cpp
diff --git a/Source/core/animation/css/CSSAnimations.cpp b/Source/core/animation/css/CSSAnimations.cpp
index dc890f63f3bd364f45f90360a0e7195dc77c3bb7..97267651e26b2b09e91f78817d15ce1e4057c42e 100644
--- a/Source/core/animation/css/CSSAnimations.cpp
+++ b/Source/core/animation/css/CSSAnimations.cpp
@@ -117,10 +117,8 @@ static void resolveKeyframes(StyleResolver* resolver, Element* element, const El
                     timingFunction = parentStyle->animations()->timingFunctionList()[0];
                 else if (value->isInheritedValue() || value->isInitialValue())
                     timingFunction = CSSTimingData::initialTimingFunction();
-                else if (value->isValueList())
-                    timingFunction = CSSToStyleMap::mapAnimationTimingFunction(toCSSValueList(value)->item(0));
                 else
-                    timingFunction = CSSToStyleMap::mapAnimationTimingFunction(value);
+                    timingFunction = CSSToStyleMap::mapAnimationTimingFunction(toCSSValueList(value)->item(0));
                 keyframe->setEasing(timingFunction.release());
             } else if (CSSAnimations::isAnimatableProperty(property)) {
                 keyframe->setPropertyValue(property, CSSAnimatableValueFactory::create(property, *keyframeStyle).get());