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

cc/animation/animation_unittest.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/animation/animation.h"
 
 #include "cc/test/animation_test_common.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 namespace {
 
 using base::TimeDelta;
 
 static base::TimeTicks TicksFromSecondsF(double seconds) {
   return base::TimeTicks::FromInternalValue(seconds *
                                             base::Time::kMicrosecondsPerSecond);
 }
 
 scoped_ptr<Animation> CreateAnimation(double iterations,
                                       double duration,
                                       double playback_rate) {
-  scoped_ptr<Animation> to_return(
-      Animation::Create(make_scoped_ptr(new FakeFloatAnimationCurve(duration)),
-                        0,
-                        1,
-                        Animation::Opacity));
+  scoped_ptr<Animation> to_return(Animation::Create(
+      make_scoped_ptr(
+          new FakeFloatAnimationCurve(duration)).PassAs<AnimationCurve>(),
+      0,
+      1,
+      Animation::Opacity));
   to_return->set_iterations(iterations);
   to_return->set_playback_rate(playback_rate);
   return to_return.Pass();
 }
 
 scoped_ptr<Animation> CreateAnimation(double iterations, double duration) {
   return CreateAnimation(iterations, duration, 1);
 }
 
 scoped_ptr<Animation> CreateAnimation(double iterations) {
@@ skipping 667 matching lines @@
   EXPECT_TRUE(anim->InEffect(TicksFromSecondsF(1.0)));
 
   anim->set_fill_mode(Animation::FillModeBoth);
   EXPECT_TRUE(anim->InEffect(TicksFromSecondsF(-1.0)));
   EXPECT_TRUE(anim->InEffect(TicksFromSecondsF(0.0)));
   EXPECT_TRUE(anim->InEffect(TicksFromSecondsF(1.0)));
 }
 
 }  // namespace
 }  // namespace cc