Update Source/platform/ to assume Oilpan only.

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 30 matching lines @@
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class CompositorAnimationTimeline;
 class ScrollableArea;
 class Scrollbar;
 
 class PLATFORM_EXPORT ScrollAnimatorBase : public ScrollAnimatorCompositorCoordinator {
 public:
-    static RawPtr<ScrollAnimatorBase> create(ScrollableArea*);
+    static ScrollAnimatorBase* create(ScrollableArea*);
 
     virtual ~ScrollAnimatorBase();
 
     virtual void dispose() { }
 
     // A possibly animated scroll. The base class implementation always scrolls
     // immediately, never animates. If the scroll is animated and currently the
     // animator has an in-progress animation, the ScrollResult will always return
     // no unusedDelta and didScroll=true, i.e. fully consuming the scroll request.
     // This makes animations latch to a single scroller. Note, the semantics are
@@ skipping 57 matching lines @@
     virtual void notifyPositionChanged();
 
     Member<ScrollableArea> m_scrollableArea;
 
     FloatPoint m_currentPos;
 };
 
 } // namespace blink
 
 #endif // ScrollAnimatorBase_h