Oilpan: improve ScrollableArea handling.

Source/platform/scroll/ScrollAnimatorNone.cpp

 /*
  * Copyright (c) 2011, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 27 matching lines @@
 #include "wtf/PassRefPtr.h"
 
 #include "platform/TraceEvent.h"
 
 namespace blink {
 
 const double kFrameRate = 60;
 const double kTickTime = 1 / kFrameRate;
 const double kMinimumTimerInterval = .001;
 
-PassRefPtr<ScrollAnimator> ScrollAnimator::create(ScrollableArea* scrollableArea)
+PassOwnPtr<ScrollAnimator> ScrollAnimator::create(ScrollableArea* scrollableArea)
 {
     if (scrollableArea && scrollableArea->scrollAnimatorEnabled())
-        return adoptRef(new ScrollAnimatorNone(scrollableArea));
-    return adoptRef(new ScrollAnimator(scrollableArea));
+        return adoptPtr(new ScrollAnimatorNone(scrollableArea));
+    return adoptPtr(new ScrollAnimator(scrollableArea));
 }
 
 ScrollAnimatorNone::Parameters::Parameters()
     : m_isEnabled(false)
 {
 }
 
 ScrollAnimatorNone::Parameters::Parameters(bool isEnabled, double animationTime, double repeatMinimumSustainTime, Curve attackCurve, double attackTime, Curve releaseCurve, double releaseTime, Curve coastTimeCurve, double maximumCoastTime)
     : m_isEnabled(isEnabled)
     , m_animationTime(animationTime)
@@ skipping 463 matching lines @@
     return m_animationActive;
 }
 
 void ScrollAnimatorNone::stopAnimationTimerIfNeeded()
 {
     if (animationTimerActive())
         m_animationActive = false;
 }
 
 } // namespace blink