Get rid of slow repaint objects and main thread scrolling reasons.

sky/engine/core/frame/FrameView.h

 /*
    Copyright (C) 1997 Martin Jones (mjones@kde.org)
              (C) 1998 Waldo Bastian (bastian@kde.org)
              (C) 1998, 1999 Torben Weis (weis@kde.org)
              (C) 1999 Lars Knoll (knoll@kde.org)
              (C) 1999 Antti Koivisto (koivisto@kde.org)
    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
@@ skipping 123 matching lines @@
     float visibleContentScaleFactor() const { return m_visibleContentScaleFactor; }
     void setVisibleContentScaleFactor(float);
 
     float inputEventsScaleFactor() const;
     IntSize inputEventsOffsetForEmulation() const;
     void setInputEventsTransformForEmulation(const IntSize&, float);
 
     AtomicString mediaType() const;
     void setMediaType(const AtomicString&);
 
-    void addSlowRepaintObject();
-    void removeSlowRepaintObject();
-    bool hasSlowRepaintObjects() const { return m_slowRepaintObjectCount; }
-
     void restoreScrollbar();
 
     void postLayoutTimerFired(Timer<FrameView>*);
 
     bool wasScrolledByUser() const;
     void setWasScrolledByUser(bool);
 
     void addWidget(RenderWidget*);
     void removeWidget(RenderWidget*);
     void updateWidgetPositions();
@@ skipping 190 matching lines @@
     // FIXME: These are just "children" of the FrameView and should be RefPtr<Widget> instead.
     HashSet<RefPtr<RenderWidget> > m_widgets;
 
     RefPtr<LocalFrame> m_frame;
     HashSet<RefPtr<Widget> > m_children;
 
     bool m_doFullPaintInvalidation;
 
     // FIXME(sky): Remove
     bool m_canHaveScrollbars;
-    unsigned m_slowRepaintObjectCount;
 
     bool m_hasPendingLayout;
     RenderObject* m_layoutSubtreeRoot;
 
     bool m_layoutSchedulingEnabled;
     bool m_inPerformLayout;
     bool m_canInvalidatePaintDuringPerformLayout;
     bool m_inSynchronousPostLayout;
     int m_layoutCount;
     unsigned m_nestedLayoutCount;
@@ skipping 66 matching lines @@
         m_view->setCanInvalidatePaintDuringPerformLayout(m_originalValue);
     }
 private:
     FrameView* m_view;
     bool m_originalValue;
 };
 
 } // namespace blink
 
 #endif // FrameView_h