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

cc/CCTimingFunction.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 CCTimingFunction_h
 #define CCTimingFunction_h
 
 #include "CCAnimationCurve.h"
 #include "UnitBezier.h"
-#include <wtf/PassOwnPtr.h>
 
 namespace cc {
 
 // See http://www.w3.org/TR/css3-transitions/.
 class CCTimingFunction : public CCFloatAnimationCurve {
 public:
     virtual ~CCTimingFunction();
 
     // Partial implementation of CCFloatAnimationCurve.
     virtual double duration() const OVERRIDE;
 
 protected:
     CCTimingFunction();
 };
 
 class CCCubicBezierTimingFunction : public CCTimingFunction {
 public:
-    static PassOwnPtr<CCCubicBezierTimingFunction> create(double x1, double y1, double x2, double y2);
+    static scoped_ptr<CCCubicBezierTimingFunction> create(double x1, double y1, double x2, double y2);
     virtual ~CCCubicBezierTimingFunction();
 
     // Partial implementation of CCFloatAnimationCurve.
     virtual float getValue(double time) const OVERRIDE;
-    virtual PassOwnPtr<CCAnimationCurve> clone() const OVERRIDE;
+    virtual scoped_ptr<CCAnimationCurve> clone() const OVERRIDE;
 
 protected:
     CCCubicBezierTimingFunction(double x1, double y1, double x2, double y2);
 
     UnitBezier m_curve;
 };
 
 class CCEaseTimingFunction {
 public:
-    static PassOwnPtr<CCTimingFunction> create();
+    static scoped_ptr<CCTimingFunction> create();
 };
 
 class CCEaseInTimingFunction {
 public:
-    static PassOwnPtr<CCTimingFunction> create();
+    static scoped_ptr<CCTimingFunction> create();
 };
 
 class CCEaseOutTimingFunction {
 public:
-    static PassOwnPtr<CCTimingFunction> create();
+    static scoped_ptr<CCTimingFunction> create();
 };
 
 class CCEaseInOutTimingFunction {
 public:
-    static PassOwnPtr<CCTimingFunction> create();
+    static scoped_ptr<CCTimingFunction> create();
 };
 
 } // namespace cc
 
 #endif // CCTimingFunction_h