[Oilpan] Move ScrollAnimators onto oilpan heap

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

Index: third_party/WebKit/Source/platform/scroll/ScrollAnimatorBase.h
diff --git a/third_party/WebKit/Source/platform/scroll/ScrollAnimatorBase.h b/third_party/WebKit/Source/platform/scroll/ScrollAnimatorBase.h
index 0917eeaada4fa4c25e58eccbaba96d9279f78863..d7993d16b0b8cae20d65b5106adc468c5e12ca07 100644
--- a/third_party/WebKit/Source/platform/scroll/ScrollAnimatorBase.h
+++ b/third_party/WebKit/Source/platform/scroll/ScrollAnimatorBase.h
@@ -44,9 +44,9 @@ 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();
 
@@ -99,13 +99,15 @@ public:
     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.