Remove ScrollableArea::notifyScrollPositionChanged and cleanup scroll animators.

Source/platform/scroll/ProgrammaticScrollAnimator.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ProgrammaticScrollAnimator_h
 #define ProgrammaticScrollAnimator_h
 
 #include "platform/geometry/FloatPoint.h"
 #include "wtf/FastAllocBase.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 class ScrollableArea;
 class WebScrollOffsetAnimationCurve;
 
 // Animator for fixed-destination scrolls, such as those triggered by
 // CSSOM View scroll APIs.
 class ProgrammaticScrollAnimator {
     WTF_MAKE_NONCOPYABLE(ProgrammaticScrollAnimator);
     WTF_MAKE_FAST_ALLOCATED(ProgrammaticScrollAnimator);
 public:
     static PassOwnPtr<ProgrammaticScrollAnimator> create(ScrollableArea*);
 
     ~ProgrammaticScrollAnimator();
 
+    void scrollToOffsetWithoutAnimation(const FloatPoint&);
     void animateToOffset(FloatPoint);
     void cancelAnimation();
     void tickAnimation(double monotonicTime);
     bool hasAnimationThatRequiresService() const;
     void updateCompositorAnimations();
     void layerForCompositedScrollingDidChange();
     void notifyCompositorAnimationFinished(int groupId);
 
 private:
     explicit ProgrammaticScrollAnimator(ScrollableArea*);
@@ skipping 12 matching lines @@
 
         // Running an animation on the main thread.
         RunningOnMainThread,
 
         // Waiting to cancel the animation currently running on the compositor.
         // There is no pending animation to replace the canceled animation.
         WaitingToCancelOnCompositor
     };
 
     void resetAnimationState();
+    void notifyPositionChanged(const DoublePoint&);
 
     ScrollableArea* m_scrollableArea;
     OwnPtr<WebScrollOffsetAnimationCurve> m_animationCurve;
     FloatPoint m_targetOffset;
     double m_startTime;
     RunState m_runState;
     int m_compositorAnimationId;
     int m_compositorAnimationGroupId;
 };
 
 } // namespace blink
 
 #endif // ProgrammaticScrollAnimator_h