First programmatic smooth scroll should run on the compositor if it can

third_party/WebKit/Source/core/testing/Internals.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 383 matching lines @@
 
     void setMediaElementNetworkState(HTMLMediaElement*, int state);
 
     // TODO(liberato): remove once autoplay gesture override experiment concludes.
     void triggerAutoplayViewportCheck(HTMLMediaElement*);
 
     // Returns the run state of the node's scroll animator (see ScrollAnimatorCompositorCoordinater::RunState),
     // or -1 if the node does not have a scrollable area.
     int getScrollAnimationState(Node*) const;
 
+    // Returns the run state of the node's programmatic scroll animator (see ScrollAnimatorCompositorCoordinater::RunState),
+    // or -1 if the node does not have a scrollable area.
+    String getProgrammaticScrollAnimationState(Node*) const;
+
 private:
     explicit Internals(ScriptState*);
     Document* contextDocument() const;
     LocalFrame* frame() const;
     Vector<String> iconURLs(Document*, int iconTypesMask) const;
     ClientRectList* annotatedRegions(Document*, bool draggable, ExceptionState&);
 
     DocumentMarker* markerAt(Node*, const String& markerType, unsigned index, ExceptionState&);
     Member<InternalRuntimeFlags> m_runtimeFlags;
 
     IterationSource* startIteration(ScriptState*, ExceptionState&) override;
 };
 
 } // namespace blink
 
 #endif // Internals_h