[cc] Use base ptr types for cc's CSS animation classes

cc/CCAnimationCurve.h

 // 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.
 
 #ifndef CCAnimationCurve_h
 #define CCAnimationCurve_h
 
+#include "base/memory/scoped_ptr.h"
 #include <public/WebTransformationMatrix.h>
-#include <wtf/PassOwnPtr.h>
 
 namespace cc {
 
 class CCFloatAnimationCurve;
 class CCTransformAnimationCurve;
 class IntSize;
 class TransformOperations;
 
 // An animation curve is a function that returns a value given a time.
 // There are currently only two types of curve, float and transform.
 class CCAnimationCurve {
 public:
     enum Type { Float, Transform };
 
     virtual ~CCAnimationCurve() { }
 
     virtual double duration() const = 0;
     virtual Type type() const = 0;
-    virtual PassOwnPtr<CCAnimationCurve> clone() const = 0;
+    virtual scoped_ptr<CCAnimationCurve> clone() const = 0;
 
     const CCFloatAnimationCurve* toFloatAnimationCurve() const;
     const CCTransformAnimationCurve* toTransformAnimationCurve() const;
 };
 
 class CCFloatAnimationCurve : public CCAnimationCurve {
 public:
     virtual ~CCFloatAnimationCurve() { }
 
     virtual float getValue(double t) const = 0;
 
     // Partial CCAnimation implementation.
     virtual Type type() const OVERRIDE;
 };
 
 class CCTransformAnimationCurve : public CCAnimationCurve {
 public:
     virtual ~CCTransformAnimationCurve() { }
 
     virtual WebKit::WebTransformationMatrix getValue(double t) const = 0;
 
     // Partial CCAnimation implementation.
     virtual Type type() const OVERRIDE;
 };
 
 } // namespace cc
 
 #endif // CCAnimation_h