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

cc/animation/animation_unittest.cc

Index: cc/animation/animation_unittest.cc
diff --git a/cc/animation/animation_unittest.cc b/cc/animation/animation_unittest.cc
index 378bb7e92d442bafe7f9c70fe82f0a8473ea5223..7b701784f8246cbcdb3bbf3e94ebbdf44fe0940a 100644
--- a/cc/animation/animation_unittest.cc
+++ b/cc/animation/animation_unittest.cc
@@ -21,12 +21,11 @@ static base::TimeTicks TicksFromSecondsF(double seconds) {
 scoped_ptr<Animation> CreateAnimation(double iterations,
                                       double duration,
                                       double playback_rate) {
-  scoped_ptr<Animation> to_return(Animation::Create(
-      make_scoped_ptr(
-          new FakeFloatAnimationCurve(duration)).PassAs<AnimationCurve>(),
-      0,
-      1,
-      Animation::Opacity));
+  scoped_ptr<Animation> to_return(
+      Animation::Create(make_scoped_ptr(new FakeFloatAnimationCurve(duration)),
+                        0,
+                        1,
+                        Animation::Opacity));
   to_return->set_iterations(iterations);
   to_return->set_playback_rate(playback_rate);
   return to_return.Pass();