Don't use cached subsequence when clip changes

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 149 matching lines @@
     LayoutRect localClipRect(const PaintLayer* ancestorLayer) const;
 
     ClipRect backgroundClipRect(const ClipRectsContext&) const;
 
     // This method figures out our layerBounds in coordinates relative to
     // |rootLayer|. It also computes our background and foreground clip rects
     // for painting/event handling.
     // Pass offsetFromRoot if known.
     void calculateRects(const ClipRectsContext&, const LayoutRect& paintDirtyRect, LayoutRect& layerBounds,
         ClipRect& backgroundRect, ClipRect& foregroundRect, const LayoutPoint* offsetFromRoot = 0) const;
+
+    ClipRects* paintingClipRects(const PaintLayer* rootLayer, ShouldRespectOverflowClip, const LayoutSize& subpixelAccumulation) const;
+
 private:
     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;
 
     // cachedClipRects looks buggy: It doesn't check whether context.rootLayer and entry.root match.
     // FIXME: Move callers to clipRectsIfCached, which does the proper checks.
     ClipRects* cachedClipRects(const ClipRectsContext& context) const
@@ skipping 14 matching lines @@
     // FIXME: Could this be a LayoutBox?
     const LayoutBoxModelObject& m_layoutObject;
 
     // Lazily created by 'cache() const'.
     mutable OwnPtr<ClipRectsCache> m_cache;
 };
 
 } // namespace blink
 
 #endif // LayerClipper_h