[Oilpan] Move ScrollAnimators onto oilpan heap

third_party/WebKit/Source/platform/scroll/ScrollAnimator.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 23 matching lines @@
 #include "platform/TraceEvent.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCompositorSupport.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/PassRefPtr.h"
 #include <algorithm>
 
 namespace blink {
 
-PassOwnPtr<ScrollAnimatorBase> ScrollAnimatorBase::create(ScrollableArea* scrollableArea)
+PassOwnPtrWillBeRawPtr<ScrollAnimatorBase> ScrollAnimatorBase::create(ScrollableArea* scrollableArea)
 {
     if (scrollableArea && scrollableArea->scrollAnimatorEnabled())
-        return adoptPtr(new ScrollAnimator(scrollableArea));
-    return adoptPtr(new ScrollAnimatorBase(scrollableArea));
+        return adoptPtrWillBeNoop(new ScrollAnimator(scrollableArea));
+    return adoptPtrWillBeNoop(new ScrollAnimatorBase(scrollableArea));
 }
 
 ScrollAnimator::ScrollAnimator(ScrollableArea* scrollableArea, WTF::TimeFunction timeFunction)
     : ScrollAnimatorBase(scrollableArea)
     , m_timeFunction(timeFunction)
 {
 }
 
 ScrollAnimator::~ScrollAnimator()
 {
@@ skipping 84 matching lines @@
 
     if (isFinished)
         m_animationCurve.clear();
     else
         scrollableArea()->scheduleAnimation();
 
     TRACE_EVENT0("blink", "ScrollAnimator::notifyPositionChanged");
     notifyPositionChanged();
 }
 
+DEFINE_TRACE(ScrollAnimator)
+{
+    ScrollAnimatorBase::trace(visitor);
+}
+
 } // namespace blink