cc: Remove use of PassAs() and constructor-casting with scoped_ptr.

cc/animation/keyframed_animation_curve_unittest.cc

Index: cc/animation/keyframed_animation_curve_unittest.cc
diff --git a/cc/animation/keyframed_animation_curve_unittest.cc b/cc/animation/keyframed_animation_curve_unittest.cc
index eceba6fc9e550b3278c6ba7d3fbc871011272de2..d9e2a3bc57e5b1afeec117bfe41041c07ee1e248 100644
--- a/cc/animation/keyframed_animation_curve_unittest.cc
+++ b/cc/animation/keyframed_animation_curve_unittest.cc
@@ -411,10 +411,7 @@ TEST(KeyframedAnimationCurveTest, CubicBezierTimingFunction) {
   scoped_ptr<KeyframedFloatAnimationCurve> curve(
       KeyframedFloatAnimationCurve::Create());
   curve->AddKeyframe(FloatKeyframe::Create(
-      0.0,
-      0.f,
-      CubicBezierTimingFunction::Create(0.25f, 0.f, 0.75f, 1.f)
-          .PassAs<TimingFunction>()));
+      0.0, 0.f, CubicBezierTimingFunction::Create(0.25f, 0.f, 0.75f, 1.f)));
   curve->AddKeyframe(
       FloatKeyframe::Create(1.0, 1.f, scoped_ptr<TimingFunction>()));