Turn FrameView's paintBehavior into a real global

Source/core/paint/DeprecatedPaintLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. 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>
@@ skipping 324 matching lines @@
     static void mapRectToPaintBackingCoordinates(const LayoutBoxModelObject* paintInvalidationContainer, LayoutRect&);
 
     // Adjusts the given rect (in the coordinate space of the LayoutObject) to the coordinate space of |paintInvalidationContainer|'s GraphicsLayer backing.
     static void mapRectToPaintInvalidationBacking(const LayoutObject*, const LayoutBoxModelObject* paintInvalidationContainer, LayoutRect&, const PaintInvalidationState* = 0);
 
     // Computes the bounding paint invalidation rect for |layoutObject|, in the coordinate space of |paintInvalidationContainer|'s GraphicsLayer backing.
     static LayoutRect computePaintInvalidationRect(const LayoutObject*, const DeprecatedPaintLayer* paintInvalidationContainer, const PaintInvalidationState* = 0);
 
     bool paintsWithTransparency(PaintBehavior paintBehavior) const
     {
-        return isTransparent() && ((paintBehavior & PaintBehaviorFlattenCompositingLayers) || compositingState() != PaintsIntoOwnBacking);
+        return isTransparent() && ((gGlobalPaintFlags & GlobalPaintFlattenCompositingLayers) || compositingState() != PaintsIntoOwnBacking);
     }
 
     bool paintsWithTransform(PaintBehavior) const;
 
     // Returns true if background phase is painted opaque in the given rect.
     // The query rect is given in local coordinates.
     bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const;
 
     bool containsDirtyOverlayScrollbars() const { return m_containsDirtyOverlayScrollbars; }
     void setContainsDirtyOverlayScrollbars(bool dirtyScrollbars) { m_containsDirtyOverlayScrollbars = dirtyScrollbars; }
@@ skipping 361 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const blink::DeprecatedPaintLayer*);
 void showLayerTree(const blink::LayoutObject*);
 #endif
 
 #endif // Layer_h