[blink] Unify PaintLayerClipper behavior with kIgnoreOverflowClip

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 78 matching lines @@
     DCHECK(respect_overflow_clip == kRespectOverflowClip);
     if (UsesCache())
       cache_slot_ = kPaintingClipRectsIgnoringOverflowClip;
     respect_overflow_clip = kIgnoreOverflowClip;
   }
 
   bool UsesCache() const { return cache_slot_ != kUncachedClipRects; }
 
   ClipRectsCacheSlot CacheSlot() const { return cache_slot_; }
 
+  bool ShouldRespectRootLayerClip() const;
+
   const PaintLayer* root_layer;
   const OverlayScrollbarClipBehavior overlay_scrollbar_clip_behavior;
 
  private:
   friend class PaintLayerClipper;
 
   ClipRectsCacheSlot cache_slot_;
   LayoutSize sub_pixel_accumulation;
   ShouldRespectOverflowClipType respect_overflow_clip;
   ShouldRespectOverflowClipType respect_overflow_clip_for_viewport;
@@ skipping 104 matching lines @@
 
   void CalculateClipRects(const ClipRectsContext&, ClipRects&) const;
   ClipRects* ClipRectsIfCached(const ClipRectsContext&) const;
   ClipRects& StoreClipRectsInCache(const ClipRectsContext&,
                                    ClipRects* parent_clip_rects,
                                    const ClipRects&) const;
 
   void GetOrCalculateClipRects(const ClipRectsContext&, ClipRects&) const;
 
   ALWAYS_INLINE bool ShouldClipOverflow(const ClipRectsContext&) const;
-  ALWAYS_INLINE bool ShouldRespectOverflowClip(const ClipRectsContext&) const;
 
   // Returned clip rect in |output| is in the space of the context's rootLayer.
   ALWAYS_INLINE void CalculateBackgroundClipRectWithGeometryMapper(
       const ClipRectsContext&,
       ClipRect& output) const;
 
   ALWAYS_INLINE void InitializeCommonClipRectState(
       const ClipRectsContext&,
       PropertyTreeState& descendant_property_tree_state,
       PropertyTreeState& ancestor_property_tree_state) const;
@@ skipping 13 matching lines @@
 
   const PaintLayer& layer_;
   bool use_geometry_mapper_;
 
   friend class PaintLayerClipperTest;
 };
 
 }  // namespace blink
 
 #endif  // LayerClipper_h