Display -webkit-filter objects in any column (instead of only in the first one).

third_party/WebKit/Source/core/paint/PaintLayer.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 282 matching lines @@
     void convertToLayerCoords(const PaintLayer* ancestorLayer, LayoutPoint&) const;
     void convertToLayerCoords(const PaintLayer* ancestorLayer, LayoutRect&) const;
 
     // Does the same as convertToLayerCoords() when not in multicol. For multicol, however,
     // convertToLayerCoords() calculates the offset in flow-thread coordinates (what the layout
     // engine uses internally), while this method calculates the visual coordinates; i.e. it figures
     // out which column the layer starts in and adds in the offset. See
     // http://www.chromium.org/developers/design-documents/multi-column-layout for more info.
     LayoutPoint visualOffsetFromAncestor(const PaintLayer* ancestorLayer) const;
 
+    // Convert a bounding box from flow thread coordinates, relative to |this|, to visual coordinates, relative to |ancestorLayer|.
+    // See http://www.chromium.org/developers/design-documents/multi-column-layout for more info on these coordinate types.
+    // This method requires this layer to be paginated; i.e. it must have an enclosingPaginationLayer().
+    void convertFromFlowThreadToVisualBoundingBoxInAncestor(const PaintLayer* ancestorLayer, LayoutRect&) const;
+
     // The hitTest() method looks for mouse events by walking layers that intersect the point from front to back.
     bool hitTest(HitTestResult&);
 
     bool intersectsDamageRect(const LayoutRect& layerBounds, const LayoutRect& damageRect, const LayoutPoint& offsetFromRoot) const;
 
     // Bounding box relative to some ancestor layer. Pass offsetFromRoot if known.
     LayoutRect physicalBoundingBox(const LayoutPoint& offsetFromRoot) const;
     LayoutRect physicalBoundingBox(const PaintLayer* ancestorLayer) const;
     LayoutRect physicalBoundingBoxIncludingReflectionAndStackingChildren(const LayoutPoint& offsetFromRoot) const;
     LayoutRect fragmentsBoundingBox(const PaintLayer* ancestorLayer) const;
@@ skipping 506 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const blink::PaintLayer*);
 void showLayerTree(const blink::LayoutObject*);
 #endif
 
 #endif // Layer_h