[Oilpan] Move ScrollAnimators onto oilpan heap

third_party/WebKit/Source/platform/scroll/ScrollAnimatorBase.h

 /*
  * Copyright (c) 2010, 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 26 matching lines @@
 #include "platform/heap/Handle.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class FloatPoint;
 class ScrollableArea;
 class Scrollbar;
 
-class PLATFORM_EXPORT ScrollAnimatorBase {
+class PLATFORM_EXPORT ScrollAnimatorBase : public NoBaseWillBeGarbageCollectedFinalized<ScrollAnimatorBase> {
 public:
-    static PassOwnPtr<ScrollAnimatorBase> create(ScrollableArea*);
+    static PassOwnPtrWillBeRawPtr<ScrollAnimatorBase> create(ScrollableArea*);
 
     virtual ~ScrollAnimatorBase();
 
+    virtual void dispose() { }
+
     // Computes a scroll destination for the given parameters.  The returned
     // ScrollResultOneDimensional will have didScroll set to false if already at
     // the destination.  Otherwise, starts scrolling towards the destination and
     // didScroll is true.  Scrolling may be immediate or animated. The base
     // class implementation always scrolls immediately, never animates.
     virtual ScrollResultOneDimensional userScroll(ScrollbarOrientation, ScrollGranularity, float step, float delta);
 
     virtual void scrollToOffsetWithoutAnimation(const FloatPoint&);
 
     ScrollableArea* scrollableArea() const { return m_scrollableArea; }
@@ skipping 29 matching lines @@
     virtual void didAddVerticalScrollbar(Scrollbar*) { }
     virtual void willRemoveVerticalScrollbar(Scrollbar*) { }
     virtual void didAddHorizontalScrollbar(Scrollbar*) { }
     virtual void willRemoveHorizontalScrollbar(Scrollbar*) { }
 
     virtual bool shouldScrollbarParticipateInHitTesting(Scrollbar*) { return true; }
 
     virtual void notifyContentAreaScrolled(const FloatSize&) { }
 
     virtual bool setScrollbarsVisibleForTesting(bool) { return false; }
+
+    DECLARE_VIRTUAL_TRACE();
+
 protected:
     explicit ScrollAnimatorBase(ScrollableArea*);
 
     virtual void notifyPositionChanged();
 
-    GC_PLUGIN_IGNORE("509911")
-    ScrollableArea* m_scrollableArea;
+    RawPtrWillBeMember<ScrollableArea> m_scrollableArea;
     float m_currentPosX; // We avoid using a FloatPoint in order to reduce
     float m_currentPosY; // subclass code complexity.
 
 private:
     float clampScrollPosition(ScrollbarOrientation, float);
 };
 
 } // namespace blink
 
 #endif // ScrollAnimatorBase_h