Remove m_shouldUpdateWhileOffscreen member from FrameView

Source/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 @@
     bool isTransparent() const;
     void setTransparent(bool isTransparent);
 
     // True if the FrameView is not transparent, and the base background color is opaque.
     bool hasOpaqueBackground() const;
 
     Color baseBackgroundColor() const;
     void setBaseBackgroundColor(const Color&);
     void updateBackgroundRecursively(const Color&, bool);
 
-    bool shouldUpdateWhileOffscreen() const;
-    void setShouldUpdateWhileOffscreen(bool);
-    bool shouldUpdate() const;
-
     void adjustViewSize();
 
     virtual IntRect windowClipRect(bool clipToContents = true) const OVERRIDE;
     IntRect windowClipRectForFrameOwner(const HTMLFrameOwnerElement*, bool clipToLayerContents) const;
 
     virtual IntRect windowResizerRect() const OVERRIDE;
 
     virtual float visibleContentScaleFactor() const OVERRIDE { return m_visibleContentScaleFactor; }
     void setVisibleContentScaleFactor(float);
 
@@ skipping 342 matching lines @@
 
     unsigned m_repaintCount;
     Vector<LayoutRect> m_repaintRects;
     Timer<FrameView> m_deferredRepaintTimer;
     double m_deferredRepaintDelay;
     double m_lastPaintTime;
 
     bool m_isTrackingRepaints; // Used for testing.
     Vector<IntRect> m_trackedRepaintRects;
 
-    bool m_shouldUpdateWhileOffscreen;
-
     RefPtr<Node> m_nodeToDraw;
     PaintBehavior m_paintBehavior;
     bool m_isPainting;
 
     unsigned m_visuallyNonEmptyCharacterCount;
     unsigned m_visuallyNonEmptyPixelCount;
     bool m_isVisuallyNonEmpty;
     bool m_firstVisuallyNonEmptyLayoutCallbackPending;
 
     RefPtr<Node> m_maintainScrollPositionAnchor;
@@ skipping 52 matching lines @@
     static const unsigned visualPixelThreshold = 32 * 32;
     if (m_visuallyNonEmptyPixelCount > visualPixelThreshold)
         setIsVisuallyNonEmpty();
 }
 
 DEFINE_TYPE_CASTS(FrameView, Widget, widget, widget->isFrameView(), widget.isFrameView());
 
 } // namespace WebCore
 
 #endif // FrameView_h