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

cc/animation/keyframed_animation_curve_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/keyframed_animation_curve.h"
 
 #include "cc/animation/transform_operations.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/animation/tween.h"
@@ skipping 393 matching lines @@
   EXPECT_FLOAT_EQ(6.f, curve->GetValue(1.5f));
   EXPECT_FLOAT_EQ(8.f, curve->GetValue(2.f));
   EXPECT_FLOAT_EQ(8.f, curve->GetValue(3.f));
 }
 
 // Tests that a cubic bezier timing function works as expected.
 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)));
+      0.0,
+      0.f,
+      CubicBezierTimingFunction::Create(0.25f, 0.f, 0.75f, 1.f)
+          .PassAs<TimingFunction>()));
   curve->AddKeyframe(
       FloatKeyframe::Create(1.0, 1.f, scoped_ptr<TimingFunction>()));
 
   EXPECT_FLOAT_EQ(0.f, curve->GetValue(0.f));
   EXPECT_LT(0.f, curve->GetValue(0.25f));
   EXPECT_GT(0.25f, curve->GetValue(0.25f));
   EXPECT_NEAR(curve->GetValue(0.5f), 0.5f, 0.00015f);
   EXPECT_LT(0.75f, curve->GetValue(0.75f));
   EXPECT_GT(1.f, curve->GetValue(0.75f));
   EXPECT_FLOAT_EQ(1.f, curve->GetValue(1.f));
@@ skipping 112 matching lines @@
   TransformOperations operations3;
   operations3.AppendRotate(1.f, 0.f, 0.f, 90.f);
   curve->AddKeyframe(TransformKeyframe::Create(
       3.0, operations3, EaseTimingFunction::Create()));
 
   EXPECT_FALSE(curve->MaximumScale(&maximum_scale));
 }
 
 }  // namespace
 }  // namespace cc