Refactor ScrollableArea::setScrollPosition.

third_party/WebKit/Source/core/frame/RootFrameViewport.h

 // Copyright 2015 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 RootFrameViewport_h
 #define RootFrameViewport_h
 
 #include "core/CoreExport.h"
 #include "platform/scroll/ScrollableArea.h"
 
@@ skipping 56 matching lines @@
       IncludeScrollbarsInRect = ExcludeScrollbars) const override;
   bool shouldUseIntegerScrollOffset() const override;
   LayoutRect visualRectForScrollbarParts() const override {
     ASSERT_NOT_REACHED();
     return LayoutRect();
   }
   bool isActive() const override;
   int scrollSize(ScrollbarOrientation) const override;
   bool isScrollCornerVisible() const override;
   IntRect scrollCornerRect() const override;
-  void setScrollOffset(const DoublePoint&, ScrollType) override;
+  void updateScrollPosition(const DoublePoint&, ScrollType) override;
   IntPoint scrollPosition() const override;
   DoublePoint scrollPositionDouble() const override;
   IntPoint minimumScrollPosition() const override;
   IntPoint maximumScrollPosition() const override;
   DoublePoint maximumScrollPositionDouble() const override;
   IntSize contentsSize() const override;
   bool scrollbarsCanBeActive() const override;
   IntRect scrollableAreaBoundingBox() const override;
   bool userInputScrollable(ScrollbarOrientation) const override;
   bool shouldPlaceVerticalScrollbarOnLeft() const override;
@@ skipping 43 matching lines @@
 
 DEFINE_TYPE_CASTS(RootFrameViewport,
                   ScrollableArea,
                   scrollableArea,
                   scrollableArea->isRootFrameViewport(),
                   scrollableArea.isRootFrameViewport());
 
 }  // namespace blink
 
 #endif  // RootFrameViewport_h