Remove FrameView::containsScrollableArea

Source/core/rendering/RenderLayerScrollableArea.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 153 matching lines @@
     bool isPointInResizeControl(const IntPoint& absolutePoint, ResizerHitTestType) const;
     bool hitTestOverflowControls(HitTestResult&, const IntPoint& localPoint);
 
     bool hitTestResizerInFragments(const LayerFragments&, const HitTestLocation&) const;
 
     LayoutRect exposeRect(const LayoutRect&, const ScrollAlignment& alignX, const ScrollAlignment& alignY);
 
     // Returns true our scrollable area is in the FrameView's collection of scrollable areas. This can
     // only happen if we're both scrollable, and we do in fact overflow. This means that overflow: hidden
     // layers never get added to the FrameView's collection.
-    bool scrollsOverflow() const;
+    bool scrollsOverflow() const { return m_scrollsOverflow; }
 
     // Rectangle encompassing the scroll corner and resizer rect.
     IntRect scrollCornerAndResizerRect() const;
 
     bool needsCompositedScrolling() const;
 
     // FIXME: This needs to be exposed as forced compositing scrolling is a RenderLayerScrollableArea
     // concept and stacking container is a RenderLayerStackingNode concept.
     bool adjustForForceCompositedScrollingMode(bool) const;
 
@@ skipping 37 matching lines @@
     void updateCompositingLayersAfterScroll();
     virtual void updateNeedsCompositedScrolling() OVERRIDE;
     bool setNeedsCompositedScrolling(bool);
 
     void setForceNeedsCompositedScrolling(ForceNeedsCompositedScrollingMode);
 
     RenderBox* m_box;
 
     // Keeps track of whether the layer is currently resizing, so events can cause resizing to start and stop.
     unsigned m_inResizeMode : 1;
+    unsigned m_scrollsOverflow : 1;
 
     unsigned m_scrollDimensionsDirty : 1;
     unsigned m_inOverflowRelayout : 1;
 
     unsigned m_needsCompositedScrolling : 1;
 
     ForceNeedsCompositedScrollingMode m_forceNeedsCompositedScrolling;
 
     // The width/height of our scrolled area.
     LayoutRect m_overflowRect;
@@ skipping 10 matching lines @@
     // Renderers to hold our custom scroll corner.
     RenderScrollbarPart* m_scrollCorner;
 
     // Renderers to hold our custom resizer.
     RenderScrollbarPart* m_resizer;
 };
 
 } // Namespace WebCore
 
 #endif // RenderLayerScrollableArea_h