Use float for scroll offset.

third_party/WebKit/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 "platform/heap/Handle.h"
 #include "platform/scroll/ScrollAnimatorCompositorCoordinator.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 #include <memory>
 
 namespace blink {
 
 class ScrollableArea;
 class CompositorAnimationTimeline;
 class CompositorScrollOffsetAnimationCurve;
 
 // Animator for fixed-destination scrolls, such as those triggered by
 // CSSOM View scroll APIs.
 class ProgrammaticScrollAnimator : public ScrollAnimatorCompositorCoordinator {
   WTF_MAKE_NONCOPYABLE(ProgrammaticScrollAnimator);
 
  public:
   static ProgrammaticScrollAnimator* create(ScrollableArea* scrollableArea) {
     return new ProgrammaticScrollAnimator(scrollableArea);
   }
 
   virtual ~ProgrammaticScrollAnimator();
 
-  void scrollToOffsetWithoutAnimation(const FloatPoint&);
-  void animateToOffset(FloatPoint);
+  void scrollToOffsetWithoutAnimation(const ScrollOffset&);
+  void animateToOffset(const ScrollOffset&);
 
   // ScrollAnimatorCompositorCoordinator implementation.
   void resetAnimationState() override;
   void cancelAnimation() override;
   void takeOverCompositorAnimation() override{};
   ScrollableArea* getScrollableArea() const override {
     return m_scrollableArea;
   }
   void tickAnimation(double monotonicTime) override;
   void updateCompositorAnimations() override;
   void notifyCompositorAnimationFinished(int groupId) override;
   void notifyCompositorAnimationAborted(int groupId) override{};
   void layerForCompositedScrollingDidChange(
       CompositorAnimationTimeline*) override;
 
   DECLARE_TRACE();
 
  private:
   explicit ProgrammaticScrollAnimator(ScrollableArea*);
 
-  void notifyPositionChanged(const DoublePoint&);
+  void notifyOffsetChanged(const ScrollOffset&);
 
   Member<ScrollableArea> m_scrollableArea;
   std::unique_ptr<CompositorScrollOffsetAnimationCurve> m_animationCurve;
-  FloatPoint m_targetOffset;
+  ScrollOffset m_targetOffset;
   double m_startTime;
 };
 
 }  // namespace blink
 
 #endif  // ProgrammaticScrollAnimator_h