Convert recursion to iteration in clearClipRectsIncludingDescendants

third_party/WebKit/Source/core/paint/PaintLayerClipper.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 182 matching lines @@
                       LayoutRect& layerBounds,
                       ClipRect& backgroundRect,
                       ClipRect& foregroundRect,
                       const LayoutPoint* offsetFromRoot = 0) const;
 
   ClipRects& paintingClipRects(const PaintLayer* rootLayer,
                                ShouldRespectOverflowClipType,
                                const LayoutSize& subpixelAccumulation) const;
 
  private:
+  void clearCache(ClipRectsCacheSlot);
   ClipRects& getClipRects(const ClipRectsContext&) const;
 
   void calculateClipRects(const ClipRectsContext&, ClipRects&) const;
   ClipRects* clipRectsIfCached(const ClipRectsContext&) const;
   ClipRects& storeClipRectsInCache(const ClipRectsContext&,
                                    ClipRects* parentClipRects,
                                    const ClipRects&) const;
 
   void getOrCalculateClipRects(const ClipRectsContext&, ClipRects&) const;
 
@@ skipping 16 matching lines @@
       const ClipRectsContext&,
       const ClipRect&) const;
 
   const PaintLayer& m_layer;
   std::unique_ptr<GeometryMapper> m_geometryMapper;
 };
 
 }  // namespace blink
 
 #endif  // LayerClipper_h