Remove some more frame-level scrolling machinery.

sky/engine/web/WebLocalFrameImpl.h

 /*
  * Copyright (C) 2009 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 46 matching lines @@
 // Implementation of WebFrame, note that this is a reference counted object.
 class WebLocalFrameImpl FINAL
     : public WebLocalFrame
     , public RefCounted<WebLocalFrameImpl> {
 public:
     // WebFrame methods:
     virtual bool isWebLocalFrame() const override;
     virtual WebLocalFrame* toWebLocalFrame() override;
     virtual void close() override;
     virtual WebSize scrollOffset() const override;
-    virtual void setScrollOffset(const WebSize&) override;
     virtual WebSize minimumScrollOffset() const override;
     virtual WebSize maximumScrollOffset() const override;
     virtual WebSize contentsSize() const override;
     virtual bool hasVisibleContent() const override;
     virtual WebRect visibleContentRect() const override;
     virtual bool hasHorizontalScrollbar() const override;
     virtual bool hasVerticalScrollbar() const override;
     virtual WebView* view() const override;
     virtual WebDocument document() const override;
     virtual WebPerformance performance() const override;
@@ skipping 112 matching lines @@
     // Stores the additional input events offset and scale when device metrics emulation is enabled.
     IntSize m_inputEventsOffsetForEmulation;
     float m_inputEventsScaleFactorForEmulation;
 };
 
 DEFINE_TYPE_CASTS(WebLocalFrameImpl, WebFrame, frame, frame->isWebLocalFrame(), frame.isWebLocalFrame());
 
 } // namespace blink
 
 #endif